(19)
(11)EP 3 493 516 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
29.07.2020 Bulletin 2020/31

(21)Application number: 17844791.8

(22)Date of filing:  12.01.2017
(51)International Patent Classification (IPC): 
H04N 1/107(2006.01)
H04N 1/00(2006.01)
G06T 7/80(2017.01)
H04N 1/21(2006.01)
(86)International application number:
PCT/CN2017/070996
(87)International publication number:
WO 2018/040480 (08.03.2018 Gazette  2018/10)

(54)

METHOD AND DEVICE FOR ADJUSTING SCANNING STATE

VERFAHREN UND VORRICHTUNG ZUR EINSTELLUNG EINES SCANZUSTANDES

PROCÉDÉ ET DISPOSITIF DE RÉGLAGE D'ÉTAT DE BALAYAGE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 29.08.2016 CN 201610753241

(43)Date of publication of application:
05.06.2019 Bulletin 2019/23

(60)Divisional application:
20176722.5

(73)Proprietor: Huawei Technologies Co., Ltd.
Longgang District Shenzhen, Guangdong 518129 (CN)

(72)Inventors:
  • HAN, Qingrui
    Shenzhen Guangdong 518129 (CN)
  • LI, Haili
    Shenzhen Guangdong 518129 (CN)

(74)Representative: Körber, Martin Hans 
Mitscherlich PartmbB Patent- und Rechtsanwälte Sonnenstrasse 33
80331 München
80331 München (DE)


(56)References cited: : 
WO-A1-2016/095094
CN-A- 104 168 837
CN-B- 103 200 365
CN-U- 204 963 812
US-A1- 2010 157 280
CN-A- 103 200 365
CN-A- 104 620 129
CN-U- 204 963 812
US-A1- 2008 067 251
US-A1- 2014 176 418
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    TECHNICAL FIELD



    [0001] The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for adjusting a scanning status.

    BACKGROUND



    [0002] Three-dimensional (3D) reconstruction means building a mathematical model that is for a three-dimensional object and that is suitable for computer representation and processing, provides a basis on which the three-dimensional object is processed and operated and properties of the three-dimensional object are analyzed in a computer environment, and is also a key technology that builds a virtual reality for representing an objective world in a computer.

    [0003] In computer vision, three-dimensional reconstruction is a process of reconstructing three-dimensional information based on a single-view or multi-view image. Because information of a single view is incomplete, three-dimensional reconstruction needs to take advantage of experience and knowledge. Multi-view three-dimensional reconstruction (similar to human binocular positioning) is relatively easy. The method is first calibrating a video camera, that is, calculating a relationship between an image coordinate system of the video camera and a world coordinate system, and then reconstructing three-dimensional information by using information in a plurality of two-dimensional images. General steps of three-dimensional reconstruction are as follows:
    1. (1) Obtain an image sequence.
    2. (2) Detect and match a feature point.
    3. (3) Calculate a basic matrix.
    4. (4) Calibrate a camera.
    5. (5) Restore a projection matrix of the camera and compute external parameters of the camera.
    6. (6) Obtain a three-dimensional point cloud.
    7. (7) Reconstruct a network.
    8. (8) Perform texture mapping.


    [0004] Applying the 3D scanning technology to mobile terminals has become a research focus in the industry. Currently, a mobile terminal has no detection module when scanning an object to obtain a key frame, so that effect of the obtained key frame is poor, affecting 3D reconstruction. The key frame is an image frame that participates in 3D reconstruction. Because data of a plurality of frames is obtained during 3D scanning, if all scan data participates in 3D reconstruction, a reconstruction speed is severely affected. Generally, some frames are selected from the scan data for 3D reconstruction. The selected frames are referred to as key frames. Generally, there are two methods for selecting a key frame: One is to select a key frame based on time, that is, select a key frame at an interval of a fixed quantity of frames, and the other is to select a key frame based on space, that is, select a key frame at an interval of a rotation angle.

    [0005] A method in the prior art is performing scanning around an object to obtain a key frame. However, during an implementation process in the prior art, a scanned object is collected completely based on subjective sensation of a user. Consequently, a blurry image is often collected, and a presented size of the scanned object changes greatly (a proportion of a target object to an overall image in a collection sequence changes greatly). A change in the presented size of the scanned object results in inaccurate matching of a feature point, affecting 3D reconstruction. Especially, when a camera moves too quickly during a scanning process, or a distance between the camera and the target object changes greatly, effect of the obtained key frame is relatively poor, affecting 3D reconstruction.

    [0006] CN 204 963 812 U discloses a take the hand-held type spatial digitizer who scans distance control and prompt facility, including be used for image acquisition the camera, the projected pattern camera of projection of pattern is used for carrying on and be used for control the controller of camera and the work of pattern camera of projection, the scanner is still including being used for showing the man-machine interaction module apart from the information.

    [0007] US 2014/0176418 A1 discloses a mobile device that determines a vision based pose using images captured by a camera and determines a sensor based pose using data from inertial sensors, such as accelerometers and gyroscopes.

    [0008] CN 103 200 365 B discloses a method of using a mobile terminal and a mobile terminal panorama photographing, a mobile terminal includes a mobile speed detecting means, the return position determining unit and the imaging unit adjustment.

    [0009] WO 2016/095094 A1 discloses an image processing system that comprises: an image receiving unit, for receiving shot pictures sent by an imaging apparatus; an image analyzing unit, for analyzing the shot pictures received by the image receiving unit, and obtaining exposal conditions of each part in the shot pictures.

    SUMMARY



    [0010] In view of this, embodiments of the present invention provide a method and apparatus for prompting a user to adjust a scanning status.

    [0011] The invention is defined in the independent claims. Additional features of the invention are provided in the dependent claims. In the following, parts of the description and drawings referring to embodiments which are not covered by the claims are not presented as embodiments of the invention, but as examples useful for understanding the invention.

    [0012] According to a first aspect, an embodiment of the present invention provides a method for adjusting a scanning status, used to perform scanning around a target object to obtain a key frame of the target object, where the key frame is used to construct a 3D image of the target object; and the method includes:
    determining a specific type of the target object; if the target object is a preset target type, determining a reference scan parameter of the target object; obtaining a real-time scan parameter used when a mobile terminal scans the target object; determining whether the real-time scan parameter conforms to the reference scan parameter; and generating a prompt message if the real-time scan parameter does not conform to the reference scan parameter, where the prompt message is used to prompt a user to adjust a scanning status corresponding to a current scan parameter. The target object may include a human face, an animal, a plant, and another static object. The specific type of the target object may be determined by entering a corresponding setting instruction by a user or by using an image recognition technology.

    [0013] According to a second aspect, an embodiment of the present invention provides an apparatus for adjusting a scanning status, configured to perform scanning around a target object to obtain a key frame of the target object, where the key frame is used to construct a 3D image of the target object; and the apparatus includes:

    a determining module, configured to: determine whether the target object is a preset target type, and if the target object is the preset target type, determine a reference scan parameter corresponding to the preset target type, where the reference scan parameter corresponding to the target object may be found in data stored locally or in cloud data;

    an obtaining module, configured to obtain a real-time scan parameter used when the apparatus performs scanning around the target object;

    a judging module, configured to determine whether the real-time scan parameter obtained by the obtaining module conforms to the reference scan parameter determined by the determining module; and

    a generation module, configured to generate a prompt message when the judging module determines that the real-time scan parameter does not conform to the reference scan parameter, where the prompt message is used to prompt a user to adjust a scanning status corresponding to a current scan parameter.



    [0014] According to the technical solutions of the foregoing method and the foregoing apparatus provided in the embodiments of the present invention, the real-time scan parameter is obtained, the reference scan parameter is determined, and further the user is prompted to correct the scanning status based on an offset between the real-time scan parameter and the reference scan parameter, so as to properly adjust the current scanning status, such as a scanning distance, a scanning angle, and a scanning speed, and to obtain a key frame in better quality.

    [0015] According to the first aspect or the second aspect, in a possible design, a scan parameter may be a distance (simply referred to as a scanning distance) from a scanning device to a scanned object (namely, the target object), a moving direction (simply referred to as a scanning direction) of the scanning device relative to the scanned object, a moving speed (simply referred to as a scanning speed) of the scanning device relative to the scanned object, a percentage (simply referred to as a picture proportion) of an image resolution corresponding to an area of a smallest rectangle in which a profile of the scanned object is located in an imaged picture obtained through scanning by the scanning device to an image resolution of the imaged picture, or the like. Each type of scan parameter of each target object has an optimal parameter value or value range, namely, the reference scan parameter. The reference scan parameter is often obtained through statistics collection based on a large quantity of historical empirical values. During an implementation process of the embodiments of the present invention, the reference scan parameter may be preset, or may be flexibly defined by a user. For example, the reference scan parameter may be prestored in a local memory or a cloud server.

    [0016] A key frame obtained based on a preset parameter can be in higher definition.

    [0017] According to the first aspect or the second aspect, in a possible design, a real-time scanning distance is obtained as the real-time scan parameter, and a scanning distance empirical value is obtained locally or from a cloud server. If the real-time scanning distance is greater than the scanning distance empirical value, a first prompt message is generated to prompt the user to approach the target object; or if the real-time scan parameter is less than the scanning distance empirical value, a second prompt message is generated to prompt the user to move away from the target object. The real-time scanning distance is a real-time distance of the mobile terminal relative to the target object during a process during which the mobile terminal performs circular scanning around the target object. This technology implementation may be completed by a processor by invoking a program instruction in a memory and processing and computing a scan parameter collected by a data collection system.

    [0018] The technical solution may prompt the user to collect a clear key frame at a proper scanning distance.

    [0019] According to the first aspect or the second aspect, in a possible design, a real-time picture proportion used when the target object is scanned is obtained as the real-time scan parameter; a preset picture proportion is obtained, where a picture proportion is a percentage of an image resolution corresponding to a smallest rectangle in which a portrait profile is located in an imaged picture to an image resolution of the imaged picture; and if the real-time picture proportion is less than the preset picture proportion, a third prompt message is generated to prompt the user to approach the target object; or if the real-time picture proportion is greater than the preset picture proportion, a fourth prompt message is generated to prompt the user to move away from the target object. The real-time picture proportion is a percentage of an image resolution of a smallest rectangle in which a profile of the target object is located in a real-time imaged picture of the mobile terminal to an image resolution of the entire imaged picture. This technology implementation may be completed by a processor by invoking a program instruction in a memory and processing and computing a scan parameter collected by a data collection system.

    [0020] The technical solution may prompt the user to collect a clear key frame at a proper scanning distance.

    [0021] According to the first aspect or the second aspect, in a possible design, a preset scanning speed is determined, and a real-time scanning speed is obtained. If the real-time scanning speed is greater than the preset scanning speed, a sixth prompt message is generated to prompt the user to reduce the speed of scanning the target object. The real-time scanning speed is a real-time moving speed of the mobile terminal during a process during which the mobile terminal performs circular scanning around the target object. This technology implementation may be completed by a processor.

    [0022] The technical solution may prompt the user to perform scanning at a slow moving speed, to avoid a deteriorated key frame caused by a quick scan.

    [0023] According to a third aspect, a device for prompting a user to adjust a scanning status is provided, and the device includes a memory, a processor, and a data collection system. The memory, the processor, and the data collection system are connected by using a bus for communication. The memory stores a program instruction. The data collection system is configured to obtain external image information, and can also obtain a real-time scan parameter used when a target object is scanned, such as at least one piece of the following information: speed information, distance information, and direction information. The processor invokes the program instruction to: determine whether the target object is a preset target type; if the target object is the preset target type, determine a reference scan parameter corresponding to the preset target type; determine whether the real-time scan parameter conforms to the reference scan parameter; and generate a prompt message if the real-time scan parameter does not conform to the reference scan parameter, where the prompt message is used to prompt a user to adjust a scanning status corresponding to a current scan parameter. In addition, the processor may perform any one of the foregoing possible implementations by invoking the program instruction in the memory.

    [0024] According to a fourth aspect, an embodiment of the present invention provides a mobile terminal, where the mobile terminal has corresponding functions of implementing the foregoing methods. The functions may be implemented by hardware, or implemented by executing corresponding software by hardware. The hardware or software includes one or more modules that correspond to the foregoing functions.

    [0025] According to a fifth aspect, an embodiment of the present invention provides a computer storage medium, configured to store a computer software instruction used in an operation of the foregoing mobile terminal, where the computer software instruction includes a program designed for performing the foregoing aspects.

    [0026] The technical solutions in any one of the foregoing possible designs may be combined without going against nature. For example, in a possible design, obtaining, comparison, and prompt message generation for the foregoing different types of scan parameters may be simultaneously performed. For example, when a real-time scanning distance is compared with a preset scanning distance, a real-time scanning speed may be compared with a preset scanning speed.

    BRIEF DESCRIPTION OF DRAWINGS



    [0027] 

    FIG. 1 is a schematic structural diagram of a device for adjusting a scanning status according to an embodiment of the present invention;

    FIG. 2 is a flowchart of a method for adjusting a scanning status according to an embodiment of the present invention; and

    FIG. 3 is a schematic diagram of an apparatus for adjusting a scanning status according to an embodiment of the present invention.


    DESCRIPTION OF EMBODIMENTS



    [0028] Embodiments of the present invention provide a method and an apparatus for adjusting a scanning status.

    [0029] The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are merely some but not all of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

    [0030] It should be understood that, restrictive words used in this application, such as "first", "second", "preset", and "target", are used merely for the purpose of convenient and clear description and for differentiating general terms, but do not indicate a particular order and are not dedicated words.

    [0031] The embodiments of the present invention are mainly applied to a scenario in which a mobile terminal performs 3D reconstruction (simply referred to as reconstruction) on a single scanned object, to obtain a key frame of the scanned object. During reconstruction, scanning usually needs to be performed around a target object for which a picture is to be taken and framing is to be performed. Scanning means performing shooting or burst shooting on the target object. An ideal scanning mode is to perform scanning around in a circle. During a specific implementation process, an operation error is allowed in a circular scan track, and an oval track pattern or another scan track pattern approximate to a circle may appear. Currently, a mobile terminal performs scanning based only on perception of a user during data collection, without any operation instruction. Due to errors in self-perception of the user, key frames that are obtained during scanning are often in poor quality. In the present invention, the mobile terminal obtains a real-time scan parameter, and when it is detected that the real-time scan parameter does not conform to a preset scan parameter, prompts a user to adjust a scanning status in real time, to obtain an ideal key frame.

    [0032] In the embodiments of the present invention, a key frame needs to be obtained by a mobile terminal (or may be referred to as a scanning device, a scanning terminal, a mobile device, or the like). The mobile terminal may be an intelligent terminal, or a particular image collection system. FIG. 1 is a schematic structural diagram of a device for adjusting a scanning status. The mobile terminal includes at least a data collection system 11, a memory 12, a processor 13, and a bus 14.

    [0033] The data collection system 11 includes a plurality of sensors, such as an array camera, a gyroscope, an accelerometer, and/or another sensor having a particular function (for example, a distance measurement sensor and a speed measurement sensor). The data collection system 11 may collect and obtain external information, including an external color image, posture information (a distance from a scanning device to a scanned object, a moving direction of a scanning device relative to a scanned object (namely, a target object), and a moving speed of a scanning device relative to a scanned object) of a terminal, and the like. In addition to a sensor, a data collection system having richer functions may further include some small processing units and storage units.

    [0034] The memory 12 is configured to store a program and various data, and mainly store a software unit, such as an operating system, an application, and a function instruction, or store subsets or extension sets of the operating system, application, function instruction, and the like. The memory 12 may further include a nonvolatile random access memory, provide hardware, software, and data resources for managing a computing and processing device to the processor 13, and support control software and an application.

    [0035] The processor 13 is configured to generate a corresponding operation control signal, send the signal to a corresponding part of the computing and processing device, and read and process data in software, especially read and process the data and program in the memory 12, so that each function module in the computing and processing device performs a corresponding function, and the corresponding part is controlled to act as required by an instruction. Therefore, the processor 13 may invoke some program instructions in the memory 12 to compute and process information collected by the data collection system 11, so as to complete the following technical solutions mentioned in the present invention and an equivalent replacement solution.

    [0036] The bus 14 is used to allow the foregoing hardware units 11 to 13 to be electrically connected for communication. During a specific implementation process, the mobile terminal may further include an antenna system 15, configured to transceive a wireless communication signal to implement wireless communication with a mobile communications network. The mobile communications network includes one or more of the following: a GSM network, a CDMA network, a 3G network, an FDMA network, a TDMA network, a PDC network, a TACS network, an AMPS network, a WCDMA network, a TDSCDMA network, a WIFI network, and an LTE network. In addition, the mobile terminal may further include another hardware structure, such as a Wi-Fi connection module, a display screen, and an audio component.

    [0037] Referring to FIG. 2, a method for adjusting a scanning status is provided. The method is applied when a mobile terminal performs circular scanning around a target object to obtain a key frame of the target object. A specific implementation is as follows.

    [0038] S1: Determine a reference scan parameter of a target object.

    [0039] The target object is an object for which a key frame is obtained, namely, a scanned object. Usually, scan parameters that affect quality of the key frame include a scanning distance, a scanning direction, and a scanning speed of the mobile terminal relative to the target object when the mobile terminal performs scanning around the target object, and the like. Based on historical scanning experience, each type of scan parameter of each type of target object has an optimal parameter value or value range. An optimal distance empirical value may be a specific value, or may be a value range having a proper offset. The optimal distance empirical value may be preset, or may be flexibly defined by a user. The target object may include a human face, an animal, a plant, and another static object. For ease of description, in the following embodiments, a corresponding method is described by using a portrait as the target object.

    [0040] In an implementation scenario, the mobile terminal is a device specially configured to scan a portrait. All reference scan parameters corresponding to the portrait are prestored in the device, and may be obtained by a processor of the mobile terminal. The prestored reference scan parameters may be preset by a user.

    [0041] In another implementation scenario, the mobile terminal may be configured to scan a plurality of objects, and therefore, during scanning of an object, the mobile terminal needs to determine a type of the object being scanned, that is, to determine whether the target object is a preset target type. For example, the mobile terminal determines whether the target object is a human being, a cat, or a desk. This may be implemented by entering a corresponding setting instruction by a user or by using mature image recognition technology, or by entering a definite object type by a user to inform the terminal. After it is recognized that the object type is a portrait, the processor may invoke preset data in a data collection system or a local memory, or access preset data in a cloud server, to query whether there is an empirical value of a scan parameter corresponding to the portrait. Correspondingly, the foregoing empirical value may also be prestored in the data collection system, the cloud server, or the local memory, and is invoked by the processor.

    [0042] During a specific implementation process, if the scan parameter is a scanning distance, whether there is a scanning distance empirical value that corresponds to the portrait may be first determined. The scanning distance empirical value of the portrait may range from 40 cm to 50 cm (including 40 cm and 50 cm). The scanning distance is a distance of the mobile terminal relative to the portrait during a process during which the mobile terminal performs circular scanning around the portrait.

    [0043] During a specific implementation process, alternatively, an optimal scanning distance may be indirectly determined by using a real-time picture proportion used when the portrait is scanned. Therefore, a preset picture proportion corresponding to the portrait may be obtained, and the preset picture proportion is usually a specific value between 40% and 80% or a value subrange. The picture proportion is a percentage of an image resolution corresponding to a smallest rectangle in which a portrait profile is located in an imaged picture obtained through scanning by the mobile terminal to an image resolution of the imaged picture. Specifically, an image obtained through scanning has an image resolution, for example, the image resolution of an entire imaged picture is 19201080. The image includes a portrait that needs to be reconstructed. A smallest rectangle that can encircle the portrait profile is used as a marker box to mark a head region in the imaged picture, and a percentage of the image resolution (for example, 1200800) corresponding to the smallest rectangle to the image resolution 19201080 of the imaged picture is the picture proportion. The picture proportion is for the image obtained through scanning by the mobile terminal, but has no direct relationship with a display screen. Therefore, the preset picture proportion may be used as a reference for image scanning.

    [0044] S2: Obtain a real-time scan parameter used when the mobile terminal scans the target object.

    [0045] The data collection system of the mobile terminal collects data, and sends the data to the processor for subsequent processing.

    [0046] The data collection system of the mobile terminal may include: an array camera, a gyroscope, an accelerometer, another sensor having a particular function (for example, a distance measurement sensor and a speed measurement sensor), and the like. The array camera may obtain external color images, and the gyroscope, the accelerometer, and the another sensor having a particular function may obtain scanning distance information, scanning angle information, scanning speed information, scanning direction information, and the like of the mobile terminal. The data collection can be performed by using existing mature technologies, and the technologies are not described in detail or listed in this application.

    [0047] Information such as a real-time scanning distance, a real-time scanning direction, and a real-time scanning speed of the mobile terminal may be obtained by using the data collection system. The real-time scanning distance is a real-time distance of the mobile terminal relative to the portrait during a process during which the mobile terminal performs circular scanning around the portrait; the real-time picture proportion is a percentage of an image resolution of a smallest rectangle in which a portrait profile is located in a real-time imaged picture of the mobile terminal to an image resolution of the imaged picture; and the real-time scanning speed is a real-time moving speed of the mobile terminal during a process during which the mobile terminal performs circular scanning around the portrait.

    [0048] S3: Determine whether the real-time scan parameter conforms to the reference scan parameter.

    [0049] The processor compares the real-time scan parameter in S2 with the corresponding reference scan parameter in S1, to determine whether the real-time scan parameter conforms to the reference scan parameter. If the real-time scan parameter conforms to the reference scan parameter, no prompt is provided for adjusting a current scanning status; or if the real-time scan parameter does not conform to the reference scan parameter, S4 is performed.

    [0050] S4: Generate a prompt message, where the prompt message is used to prompt a user to adjust a scanning status corresponding to a current scan parameter.

    [0051] In an example, if the processor determines that the real-time scanning distance is greater than the scanning distance empirical value, a prompt message is generated to prompt the user to move the mobile terminal to approach the portrait; or if the processor determines that the real-time scanning distance is less than the scanning distance empirical value, a prompt message is generated to prompt the user to move the mobile terminal away from the portrait. The prompt may help obtain a clear key frame that has a good picture proportion.

    [0052] In another example, if the processor determines that the real-time picture proportion of the portrait during a scanning process is less than the preset picture proportion, a prompt message is generated to prompt the user to move the mobile terminal to approach the portrait; or if the processor determines that the real-time picture proportion of the scanned object is greater than the preset picture proportion, a prompt message is generated to prompt the user to move the mobile terminal away from the portrait. The prompt may help obtain a clear key frame that has a good picture proportion.

    [0053] In another example, if the processor determines that a real-time scanning speed of the mobile terminal during a scanning process is greater than a preset scanning speed, a prompt message is generated to prompt the user to reduce a speed at which the mobile terminal scans the target object. The real-time scanning speed may be an instantaneous linear velocity or an instantaneous angular velocity. A coordinate system on which calculation of the linear velocity or the angular velocity relies uses the portrait as the center of a circle, and uses a distance from the mobile terminal to the portrait as an approximate radius. For example, if the real-time scanning speed is greater than a first radian per second, the user is prompted to slow down the collection, so that a collected key frame is in higher definition. A typical value of the first radian is 1.5 radians. The first radian is a historical empirical value obtained through statistics, and may be preset by the user. The prompt can avoid an unclear picture caused by a quick scan.

    [0054] In conclusion, by invoking a program or an instruction stored in the memory 12, the processor 13 may perform some computing and processing on a real-time scan parameter obtained by a sensor, to perform methods and equivalent methods mentioned in the foregoing method embodiments.

    [0055] By using the method embodiments provided in the present invention, the type of the scanned object is determined and the corresponding reference scan parameter is obtained based on the type of the scanned object; and the real-time scan parameter of the mobile terminal is determined, and further a prompt message for adjusting a current incorrect scanning status is generated based on an offset between the real-time scan parameter and the reference scan parameter, so as to properly adjust the current scan parameter, such as the real-time scanning distance, the real-time picture proportion, and the real-time scanning speed, and to obtain a good key frame subsequently.

    [0056] FIG. 3 shows an apparatus for adjusting a scanning status according to an embodiment of the present invention. The apparatus may be an intelligent terminal, configured to perform scanning around a target object to obtain a key frame of the target object, where the key frame is used to construct a 3D image of the target object. The apparatus 200 includes a determining module 201, an obtaining module 202, a judging module 203, and a generation module 204.

    [0057] The determining module 201 is configured to determine a reference scan parameter of the target object. The determining module may be implemented by a processor by invoking data in a local memory or a cloud server, or may be jointly implemented by a processor and a data collection system, for example, the processor determines whether the target object is a preset target object based on a picture that is taken in real time and that is collected by the data collection system, and if the target object is the preset target object, the processor may invoke data in a local memory or a cloud server to obtain the reference scan parameter.

    [0058] The obtaining module 202 is configured to obtain a real-time scan parameter used when a mobile terminal scans the target object. The obtaining module may be implemented by the data collection system, for example, by at least one of the following: an array camera, a gyroscope, an accelerometer, and a sensor having a particular function (for example, a distance measurement sensor and a speed measurement sensor).

    [0059] The judging module 203 is configured to determine whether the real-time scan parameter obtained by the obtaining module 202 conforms to the reference scan parameter determined by the determining module 201. The judging module may be implemented by the processor for performing a comparison operation.

    [0060] The generation module 204 is configured to generate a prompt message when the judging module 203 determines that the real-time scan parameter does not conform to the reference scan parameter, where the prompt message is used to prompt a user to adjust a scanning status corresponding to a current scan parameter. The generation module may be implemented in the processor, and the processor may present the prompt message subsequently by using output hardware, such as a loudspeaker and a display.

    [0061] During a specific implementation process, the determining module 201 is specifically configured to perform the method mentioned in S1 and an equivalent replacement method. The obtaining module 202 is specifically configured to perform the method mentioned in S2 and an equivalent replacement method. The judging module 203 is specifically configured to perform the method mentioned in S3 and an equivalent replacement method. The generation module 204 is specifically configured to perform the method mentioned in S4 and an equivalent replacement method. The foregoing specific method embodiments and explanations and expressions in the embodiments are also applied to method execution in the apparatus.

    [0062] According to the apparatus for prompting a user to adjust a scanning status provided in the embodiment of the present invention, the obtaining module may obtain the real-time scan parameter, the determining module is configured to determine the reference scan parameter, and when the judging module determines that an offset exists between the real-time scan parameter and the reference scan parameter, the generation module generates a prompt message for correcting the scanning status based on the offset, so as to appropriately adjust a current scanning distance, scanning angle, and/or scanning speed of the mobile terminal, and to obtain a good key frame subsequently for corresponding 3D reconstruction.

    [0063] A person of ordinary skill in the art may understand that all or some of the steps of the foregoing methods may be implemented by a program instructing relevant hardware. The program may be stored in a computer readable storage medium. With descriptions of the foregoing implementations, a person skilled in the art may clearly understand that the present invention may be implemented by hardware, firmware or a combination thereof.

    [0064] The foregoing embodiments are merely example embodiments of the technical solutions of the present invention, which is defined by the claims.


    Claims

    1. A method for adjusting a scanning status, used to perform scanning around a target object to obtain a key frame of the target object, wherein the key frame is used to construct a 3D image of the target object; and the method comprises:

    determining, by a mobile terminal, whether the target object is a preset target type;

    if the target object is the preset target type, determining a reference scan parameter corresponding to the preset target type;

    obtaining a real-time scan parameter used when the mobile terminal performs scanning around the target object;

    determining whether the real-time scan parameter conforms to the reference scan parameter; and

    generating a prompt message if the real-time scan parameter does not conform to the reference scan parameter, wherein the prompt message is used to prompt a user to adjust a scanning status corresponding to a current scan parameter;

    characterized in that,

    if the preset target type is a portrait, the determining a reference scan parameter corresponding to the target object comprises:

    obtaining a preset picture proportion corresponding to the portrait to use the preset picture proportion as the reference scan parameter, wherein the picture proportion is a percentage of an image resolution corresponding to a smallest rectangle in which a portrait profile is located in an imaged picture to an image resolution of the imaged picture;

    the obtaining a real-time scan parameter used when the mobile terminal performs scanning around the target object comprises:

    obtaining a real-time picture proportion of the portrait generated when the mobile terminal scans the portrait, wherein the real-time picture proportion is a percentage of an image resolution corresponding to an area of a smallest rectangle in which a portrait profile is located in a real-time imaged picture of the mobile terminal to an image resolution of the imaged picture; and

    the generating a prompt message if the real-time scan parameter does not conform to the reference scan parameter, wherein the prompt message is used to prompt a user to adjust a scanning status corresponding to a current scan parameter comprises:
    generating a prompt message if the real-time picture proportion is less than the preset picture proportion, wherein the prompt message is used to prompt the user to move the mobile terminal to approach the target object; or generating a prompt message if the real-time picture proportion is greater than the preset picture proportion, wherein the prompt message is used to prompt the user to move the mobile terminal away from the target object.


     
    2. An apparatus for adjusting a scanning status, configured to perform scanning around a target object to obtain a key frame of the target object, wherein the key frame is used to construct a 3D image of the target object; and the apparatus comprises:

    a determining module, configured to: determine whether the target object is a preset target type, and if the target object is the preset target type, determine a reference scan parameter corresponding to the preset target type;

    an obtaining module, configured to obtain a real-time scan parameter used when the apparatus performs scanning around the target object;

    a judging module, configured to determine whether the real-time scan parameter obtained by the obtaining module conforms to the reference scan parameter determined by the determining module; and

    a generation module, configured to generate a prompt message when the judging module determines that the real-time scan parameter does not conform to the reference scan parameter, wherein the prompt message is used to prompt a user to adjust a scanning status corresponding to a current scan parameter;

    characterized in that,

    if the preset target type is a portrait, the determining module is specifically configured to obtain a preset picture proportion corresponding to the portrait to use the preset picture proportion as the reference scan parameter, wherein the picture proportion is a percentage of an image resolution corresponding to a smallest rectangle in which a portrait profile is located in an imaged picture to an image resolution of the imaged picture;

    the obtaining module is specifically configured to obtain a real-time picture proportion of the portrait generated when the apparatus scans the portrait, wherein the real-time picture proportion is a percentage of an image resolution corresponding to an area of a smallest rectangle in which a portrait profile is located in a real-time imaged picture of the apparatus to an image resolution of the imaged picture; and

    the generation module is specifically configured to: generate a prompt message if the judging module determines that the real-time picture proportion is less than the preset picture proportion, wherein the prompt message is used to prompt the user to move the apparatus to approach the target object; or generate a prompt message if the judging module determines that the real-time picture proportion is greater than the preset picture proportion, wherein the prompt message is used to prompt the user to move the apparatus away from the target object.


     
    3. A mobile device, wherein the device comprises a memory, a processor, a bus, and a data collection system, and wherein
    the memory, the processor, and the data collection system are connected by using the bus for communication, and the data collection system is configured to scan, under control of the processor, a target object to obtain a key frame of the target object, wherein the key frame is used to construct a 3D image of the target object, wherein
    the memory is configured to store a program instruction; and
    the processor invokes the program instruction to:

    when the data collection system scans the target object, determine whether the target object is a preset target type;

    if the target object is the preset target type, determine a reference scan parameter corresponding to the preset target type; and obtain, by using the data collection system, a real-time scan parameter used when the target object is scanned; and

    determine whether the real-time scan parameter obtained by the data collection system conforms to the reference scan parameter; and generate a prompt message if the real-time scan parameter does not conform to the reference scan parameter, wherein the prompt message is used to prompt a user to adjust a scanning status corresponding to a current scan parameter;

    characterized in that,

    when the data collection system scans the target object, determine whether the target object scanned by the data collection system is a portrait;

    if a result of determining is that the preset target type is a portrait, obtain a preset picture proportion corresponding to the portrait to use the preset picture proportion as the reference scan parameter, wherein the picture proportion is a percentage of an image resolution corresponding to a smallest rectangle in which a portrait profile is located in an imaged picture to an image resolution of the imaged picture;

    obtain, by using the data collection system, a real-time picture proportion used when the mobile device scans the portrait, wherein the real-time picture proportion is a percentage of an image resolution corresponding to an area of a smallest rectangle in which a portrait profile is located in a real-time imaged picture of the mobile device to an image resolution of the imaged picture; and

    generate a prompt message if the processor determines that the real-time picture proportion is less than the preset picture proportion, wherein the prompt message is used to prompt the user to move the mobile device to approach the target object; or generate a prompt message if the processor determines that the real-time picture proportion is greater than the preset picture proportion, wherein the prompt message is used to prompt the user to move the mobile device away from the target object.


     
    4. The mobile device according to claim 3, wherein the mobile device further comprises an antenna system, and the antenna system transceives, under control of the processor, a wireless communication signal to implement wireless communication with a mobile communications network.
     
    5. The mobile device according to claim 4, wherein the mobile communications network comprises one or more of the following: a GSM network, a CDMA network, a 3G network, an FDMA network, a TDMA network, a PDC network, a TACS network, an AMPS network, a WCDMA network, a TDSCDMA network, a WIFI network, or an LTE network.
     


    Ansprüche

    1. Verfahren zum Einstellen eines Scanzustands, das verwendet wird, um einen Scanvorgang um ein Zielobjekt durchzuführen, um einen Keyframe des Zielobjekts zu erhalten, wobei der Keyframe dazu verwendet wird, ein 3D-Bild des Zielobjekts zu konstruieren; und wobei das Verfahren Folgendes umfasst:

    Bestimmen, ob das Zielobjekt eine voreingestellte Zielart ist, durch ein mobiles Endgerät;

    Bestimmen eines Referenzscanparameters, der der voreingestellten Zielart entspricht, wenn das Zielobjekt die voreingestellte Zielart ist;

    Erhalten eines Echtzeitscanparameters, wenn das mobile Endgerät einen Scanvorgang um das Zielobjekt durchführt;

    Bestimmen, ob der Echtzeitscanparameter konform zu dem Referenzscanparameter ist; und

    Erzeugen einer Eingabeaufforderung, wenn der Echtzeitscanparameter nicht konform zu dem Referenzscanparameter ist, wobei die Eingabeaufforderung dazu verwendet wird, einen Benutzer dazu aufzufordern, einen Scanzustand entsprechend einem aktuellen Scanparameter einzustellen;

    dadurch gekennzeichnet, dass

    das Bestimmen eines Referenzscanparameters entsprechend dem Zielobjekt Folgendes umfasst, wenn die voreingestellte Zielart ein Porträt ist:

    Erhalten eines voreingestellten Bildverhältnisses entsprechend dem Porträt, um das voreingestellte Bildverhältnis als Referenzscanparameter zu nutzen, wobei das Bildverhältnis eine Prozentzahl einer Bildauflösung, die einem kleinsten Rechteck entspricht, in dem sich ein Porträtprofil in einem abgebildeten Bild befindet, zu einer Bildauflösung des abgebildeten Bilds ist;

    wobei das Erhalten eines Echtzeitscanparameters, der verwendet wird, wenn das mobile Endgerät einen Scanvorgang um das Zielobjekt durchführt, Folgendes umfasst:

    Erhalten eines Echtzeitbildverhältnisses des Porträts, die erzeugt wird, wenn das mobile Endgerät das Porträt scannt, wobei das Echtzeitbildverhältnis ein Prozentsatz einer Bildauflösung,

    die einem Bereich eines kleinsten Rechtecks entspricht, in dem sich ein Porträtprofil in einem in Echtzeit abgebildeten Bild des mobilen Endgeräts befindet, zu einer Bildauflösung des abgebildeten Bilds ist; und

    wobei das Erzeugen einer Eingabeaufforderung, wenn der Echtzeitscanparameter nicht konform zu dem Referenzscanparameter ist, wobei die Eingabeaufforderung dazu verwendet wird, einen Benutzer dazu aufzufordern, einen Scanzustand entsprechend einem aktuellen Scanparameter einzustellen, Folgendes umfasst:
    Erzeugen einer Eingabeaufforderung, wenn das Echtzeitbildverhältnis geringer ist als das voreingestellte Bildverhältnis, wobei die Eingabeaufforderung dazu verwendet wird, den Benutzer dazu aufzufordern, das mobile Endgerät zu bewegen, um sich dem Zielobjekt zu nähern; oder Erzeugen einer Eingabeaufforderung, wenn das Echtzeitbildverhältnis größer als das voreingestellte Bildverhältnis ist, wobei die Eingabeaufforderung dazu verwendet wird, den Benutzer dazu aufzufordern, das mobile Endgerät von dem Zielobjekt wegzubewegen.


     
    2. Apparat zum Einstellen eines Scanzustands, der dazu konfiguriert ist, einen Scanvorgang um ein Zielobjekt durchzuführen, um einen Keyframe des Zielobjekts zu erhalten, wobei der Keyframe dazu verwendet wird, ein 3D-Bild des Zielobjekts zu konstruieren; und wobei der Apparat Folgendes umfasst:
    ein Bestimmungsmodul, das zu Folgendem konfiguriert ist:

    Bestimmen, ob das Zielobjekt eine voreingestellte Zielart ist, und ob das Zielobjekt die voreingestellte Zielart ist, Bestimmen eines Referenzscanparameters, der der voreingestellten Zielart entspricht;

    ein Erhaltungsmodul, das dazu konfiguriert ist, einen Echtzeitscanparameter zu erhalten, der verwendet wird, wenn der Apparat einen Scanvorgang um das Zielobjekt durchführt;

    ein Beurteilungsmodul, das dazu konfiguriert ist, zu bestimmen, ob der Echtzeitscanparameter, der durch das Erhaltungsmodul erhalten wird, konform zu dem Referenzscanparameter ist, der von dem Bestimmungsmodul bestimmt wird; und

    ein Erzeugungsmodul, das dazu konfiguriert ist, eine Eingabeaufforderung zu erzeugen, wenn das Beurteilungsmodul bestimmt, dass der Echtzeitscanparameter nicht konform zu dem Referenzscanparameter ist, wobei die Eingabeaufforderung dazu verwendet wird, einen Benutzer aufzufordern, einen Scanzustand entsprechend einem aktuellen Scanparameter einzustellen;

    dadurch gekennzeichnet, dass

    das Bestimmungsmodul speziell dazu konfiguriert ist, ein voreingestelltes Bildverhältnis zu erhalten, das dem Porträt entspricht, um das voreingestellte Bildverhältnis als den Referenzscanparameter zu verwenden, wenn die voreingestellte Zielart ein Porträt ist, wobei das Bildverhältnis ein Prozentsatz einer Bildauflösung, die einem kleinsten Rechteck entspricht, in dem sich ein Porträtprofil in einem abgebildeten Bild befindet, zu einer Bildauflösung des abgebildeten Bilds ist;

    das Erhaltungsmodul speziell dazu konfiguriert ist, ein Echtzeitbildverhältnis des Porträts zu erhalten, das erzeugt wird, wenn der Apparat das Porträt scannt, wobei das Echtzeitbildverhältnis ein Prozentsatz einer Bildauflösung, die einem Bereich eines kleinsten Rechtecks entspricht, in dem sich ein Porträtprofil in einem in Echtzeit abgebildeten Bild des Apparats befindet, zu einer Bildauflösung des abgebildeten Bilds ist; und

    das Erzeugungsmodul speziell zu Folgendem konfiguriert ist: Erzeugen einer Eingabeaufforderung, wenn das Beurteilungsmodul bestimmt, dass das Echtzeitbildverhältnis geringer ist als das voreingestellte Bildverhältnis, wobei die Eingabeaufforderung dazu verwendet wird, den Benutzer aufzufordern, den Apparat zu bewegen, um sich dem Zielobjekt zu nähern; oder Erzeugen einer Eingabeaufforderung, wenn das Beurteilungsmodul bestimmt, dass das Echtzeitbildverhältnis größer als das voreingestellte Bildverhältnis ist, wobei die Eingabeaufforderung dazu verwendet wird, den Benutzer dazu aufzufordern, den Apparat von dem Zielobjekt wegzubewegen.


     
    3. Mobile Vorrichtung, wobei die Vorrichtung einen Speicher, einen Prozessor, einen Bus und ein Datensammelsystem umfasst, und wobei
    der Speicher, der Prozessor und das Datensammelsystem durch Verwenden des Busses zur Kommunikation verbunden sind, und wobei das Datensammelsystem dazu konfiguriert ist, gesteuert von dem Prozessor ein Zielobjekt zu scannen, um einen Keyframe des Zielobjekts zu erhalten, wobei der Keyframe dazu verwendet wird, ein 3D-Bild des Zielobjekts zu konstruieren, wobei der Speicher dazu konfiguriert ist, eine Programmanweisung zu speichern; und
    der Prozessor die Programmanweisung zu Folgendem aufruft:

    Bestimmen, ob das Zielobjekt eine voreingestellte Zielart ist, wenn das Datensammelsystem das Zielobjekt scannt;

    Bestimmen eines Referenzscanparameters, der der voreingestellten Zielart entspricht, wenn das Zielobjekt die voreingestellte Zielart ist; und Erhalten eines Echtzeitscanparameters durch Verwenden des Datensammelsystems, wenn das Zielobjekt gescannt ist; und

    Bestimmen, ob der Echtzeitscanparameter, der durch das Datensammelsystem erhalten wurde, konform zu dem Referenzscanparameter ist; und Erzeugen einer Eingabeaufforderung, wenn der Echtzeitscanparameter nicht konform zu dem Referenzscanparameter ist, wobei die Eingabeaufforderung dazu verwendet wird, einen Benutzer dazu aufzufordern, einen Scanzustand entsprechend einem aktuellen Scanparameter einzustellen;

    durch Folgendes gekennzeichnet:

    Bestimmen, ob das Zielobjekt, das von dem Datensammelsystem gescannt wurde, ein Porträt ist, wenn das Datensammelsystem das Zielobjekt scannt;

    Erhalten eines voreingestellten Bildverhältnisses, das dem Porträt entspricht, um das voreingestellte Bildverhältnis als den Referenzscanparameter zu nutzen, wenn ein Ergebnis des Bestimmens lautet, dass die voreingestellte Zielart ein Porträt ist, wobei das Bildverhältnis ein Prozentsatz einer Bildauflösung, die einem kleinsten Rechteck entspricht, in dem sich ein Porträtprofil in einem abgebildeten Bild befindet, zu einer Bildauflösung des abgebildeten Bilds ist;

    Erhalten eines Echtzeitbildverhältnisses, das verwendet wird, wenn die mobile Vorrichtung das Porträt scannt, durch Verwenden des Datensammelsystems, wobei das Echtzeitbildverhältnis ein Prozentsatz einer Bildauflösung, die einem Bereich eines kleinsten Rechtecks entspricht, in dem sich ein Porträtprofil in einem in Echtzeit abgebildeten Bild der mobilen Vorrichtung befindet, zu einer Bildauflösung des abgebildeten Bilds ist; und Erzeugen einer Eingabeaufforderung, wenn der Prozessor bestimmt, dass das Echtzeitbildverhältnis geringer ist als das voreingestellte Bildverhältnis, wobei die Eingabeaufforderung dazu verwendet wird, den Benutzer aufzufordern, die mobile Vorrichtung zu bewegen, um sich dem Zielobjekt zu nähern; oder Erzeugen einer Eingabeaufforderung, wenn der Prozessor bestimmt, dass das Echtzeitbildverhältnis größer als das voreingestellte Bildverhältnis ist, wobei die Eingabeaufforderung dazu verwendet wird, den Benutzer dazu aufzufordern, die mobile Vorrichtung von dem Zielobjekt wegzubewegen.


     
    4. Mobile Vorrichtung nach Anspruch 3, wobei die mobile Vorrichtung ferner ein Antennensystem umfasst, und das Antennensystem unter der Steuerung des Prozessors ein drahtloses Kommunikationssignal empfängt, um drahtlose Kommunikation mit einem mobilen Kommunikationsnetzwerk zu implementieren.
     
    5. Mobile Vorrichtung nach Anspruch 4, wobei das mobile Kommunikationsnetzwerk eines oder mehrere von Folgendem umfasst: ein GSM-Netzwerk, ein CDMA-Netzwerk, ein 3G-Netzwerk, ein FDMA-Netzwerk, ein TDMA-Netzwerk, ein PDC-Netzwerk, ein TACS-Netzwerk, ein AMPS-Netzwerk, ein WCDMA-Netzwerk, ein TDSCDMA-Netzwerk, ein WLAN-Netzwerk oder ein LTE-Netzwerk.
     


    Revendications

    1. Procédé de réglage d'un statut de balayage, utilisé pour réaliser un balayage autour d'un objet cible pour obtenir une image clé de l'objet cible, dans lequel l'image clé est utilisée pour construire une image 3D de l'objet cible ; et le procédé comprend :

    la détermination, par un terminal mobile, permettant de savoir si l'objet cible est un type de cible préétabli ;

    si l'objet cible est le type de cible préétabli, la détermination d'un paramètre de balayage de référence correspondant au type de cible préétabli ;

    l'obtention d'un paramètre de balayage en temps réel utilisé lorsque le terminal mobile réalise un balayage autour de l'objet cible ;

    la détermination permettant de savoir si le paramètre de balayage en temps réel est conforme au paramètre de balayage de référence ; et

    la génération d'un message d'invite si le paramètre de balayage en temps réel n'est pas conforme au paramètre de balayage de référence, dans lequel le message d'invite est utilisé pour inviter un utilisateur à régler un statut de balayage correspondant à un paramètre de balayage actuel ;

    caractérisé en ce que,

    si le type de cible préétabli est un portrait, la détermination d'un paramètre de balayage de référence correspondant à l'objet cible comprend :

    l'obtention d'une proportion d'image photographique préétablie correspondant au portrait pour utiliser la proportion d'image photographique préétablie en tant que paramètre de balayage de référence, dans lequel la proportion d'image photographique est un pourcentage d'une résolution d'image correspondant à un rectangle le plus petit dans lequel un profil de portrait est situé dans une image photographique imagée à une résolution d'image de l'image photographique imagée ;

    l'obtention d'un paramètre de balayage en temps réel utilisé lorsque le terminal mobile réalise un balayage autour de l'objet cible comprend :

    l'obtention d'une proportion d'image photographique en temps réel du portrait généré lorsque le terminal mobile balaie le portrait, dans lequel la proportion d'image photographique en temps réel est un pourcentage d'une résolution d'image correspondant à une zone d'un rectangle le plus petit dans lequel un profil de portrait est situé dans une image photographique imagée en temps réel du terminal mobile à une résolution d'image de l'image photographique imagée ; et

    la génération d'un message d'invite si le paramètre de balayage en temps réel n'est pas conforme au paramètre de balayage de référence, dans lequel le message d'invite est utilisé pour inviter un utilisateur à régler un statut de balayage correspondant à un paramètre de balayage actuel, comprend :
    la génération d'un message d'invite si la proportion d'image photographique en temps réel est inférieure à la proportion d'image photographique préétablie, dans lequel le message d'invite est utilisé pour inviter l'utilisateur à déplacer le terminal mobile pour l'approcher de l'objet cible ; ou la génération d'un message d'invite si la proportion d'image photographique en temps réel est supérieure à la proportion d'image photographique préétablie, dans lequel le message d'invite est utilisé pour inviter l'utilisateur à déplacer le terminal mobile et l'éloigner de l'objet cible.


     
    2. Appareil de réglage d'un statut de balayage, configuré pour réaliser un balayage autour d'un objet cible pour obtenir une image clé de l'objet cible, dans lequel l'image clé est utilisée pour construire une image 3D de l'objet cible ; et l'appareil comprend :

    un module de détermination, configuré pour : déterminer si l'objet cible est un type de cible préétabli, et si l'objet cible est le type de cible préétabli, déterminer un paramètre de balayage de référence correspondant au type de cible préétabli ;

    un module d'obtention, configuré pour obtenir un paramètre de balayage en temps réel utilisé lorsque l'appareil réalise un balayage autour de l'objet cible ;

    un module de jugement, configuré pour déterminer si le paramètre de balayage en temps réel obtenu par le module d'obtention est conforme au paramètre de balayage de référence déterminé par le module de détermination ; et

    un module de génération, configuré pour générer un message d'invite lorsque le module de jugement détermine que le paramètre de balayage en temps réel n'est pas conforme au paramètre de balayage de référence, dans lequel le message d'invite est utilisé pour inviter un utilisateur à régler un statut de balayage correspondant à un paramètre de balayage actuel ;

    caractérisé en ce que,

    si le type de cible préétabli est un portrait, le module de détermination est spécifiquement configuré pour obtenir une proportion d'image photographique préétablie correspondant au portrait pour utiliser la proportion d'image photographique préétablie en tant que paramètre de balayage de référence, dans lequel la proportion d'image photographique est un pourcentage d'une résolution d'image correspondant à un rectangle le plus petit dans lequel un profil de portrait est situé dans une image photographique imagée à une résolution d'image de l'image photographique imagée ;

    le module d'obtention est spécifiquement configuré pour obtenir une proportion d'image photographique en temps réel du portrait généré lorsque l'appareil balaie le portrait, dans lequel la proportion d'image photographique en temps réel est un pourcentage d'une résolution d'image correspondant à une zone d'un rectangle le plus petit dans lequel un profil de portrait est situé dans une image photographique imagée en temps réel de l'appareil à une résolution d'image de l'image photographique imagée ; et

    le module de génération est spécifiquement configuré pour :
    générer un message d'invite si le module de jugement détermine que la proportion d'image photographique en temps réel est inférieure à la proportion d'image photographique préétablie, dans lequel le message d'invite est utilisé pour inviter l'utilisateur à déplacer l'appareil pour l'approcher de l'objet cible ; ou générer un message d'invite si le module de jugement détermine que la proportion d'image photographique en temps réel est supérieure à la proportion d'image photographique préétablie, dans lequel le message d'invite est utilisé pour inviter l'utilisateur à déplacer l'appareil et l'éloigner de l'objet cible.


     
    3. Dispositif mobile, dans lequel le dispositif comprend une mémoire, un processeur, un bus, et un système de collecte de données, et dans lequel
    la mémoire, le processeur, et le système de collecte de données sont connectés en utilisant le bus pour une communication, et le système de collecte de données est configuré pour balayer, sous la commande du processeur, un objet cible pour obtenir une image clé de l'objet cible, dans lequel l'image clé est utilisée pour construire une image 3D de l'objet cible, dans lequel la mémoire est configurée pour stocker une instruction de programme ; et
    le processeur appelle l'instruction de programme pour :

    lorsque le système de collecte de données balaie l'objet cible, déterminer si l'objet cible est un type de cible préétabli ;

    si l'objet cible est le type de cible préétabli, déterminer un paramètre de balayage de référence correspondant au type de cible préétabli ; et obtenir, en utilisant le système de collecte de données, un paramètre de balayage en temps réel utilisé lorsque l'objet cible est balayé ; et

    déterminer si le paramètre de balayage en temps réel obtenu par le système de collecte de données est conforme au paramètre de balayage de référence ; et générer un message d'invite si le paramètre de balayage en temps réel n'est pas conforme au paramètre de balayage de référence, dans lequel le message d'invite est utilisé pour inviter un utilisateur à régler un statut de balayage correspondant à un paramètre de balayage actuel ;

    caractérisé en ce que,

    lorsque le système de collecte de données balaie l'objet cible, déterminer si l'objet cible balaie par le système de collecte de données est un portrait ;

    si un résultat de détermination est que le type de cible préétabli est un portrait, obtenir une proportion d'image photographique préétablie correspondant au portrait pour utiliser la proportion d'image photographique préétablie en tant que paramètre de balayage de référence, dans lequel la proportion d'image photographique est un pourcentage d'une résolution d'image correspondant à un rectangle le plus petit dans lequel un profil de portrait est situé dans une image photographique imagée à une résolution d'image de l'image photographique imagée ;

    obtenir, en utilisant le système de collecte de données, une proportion d'image photographique en temps réel utilisée lorsque le dispositif mobile balaie le portrait, dans lequel la proportion d'image photographique en temps réel est un pourcentage d'une résolution d'image correspondant à une zone d'un rectangle le plus petit dans lequel un profil de portrait est situé dans une image photographique imagée en temps réel du dispositif mobile à une résolution d'image de l'image photographique imagée ; et

    générer un message d'invite si le processeur détermine que la proportion d'image photographique en temps réel est inférieure à la proportion d'image photographique préétablie, dans lequel le message d'invite est utilisé pour inviter l'utilisateur à déplacer le dispositif mobile pour l'approcher de l'objet cible ;

    ou générer un message d'invite si le processeur détermine que la proportion d'image photographique en temps réel est supérieure à la proportion d'image photographique préétablie, dans lequel le message d'invite est utilisé pour inviter l'utilisateur à déplacer le dispositif mobile et l'éloigner de l'objet cible.


     
    4. Dispositif mobile selon la revendication 3, dans lequel le dispositif mobile comprend en outre un système d'antenne, et le système d'antenne émet et reçoit, sous la commande du processeur, un signal de communication sans fil pour mettre en Ĺ“uvre une communication sans fil avec un réseau de communications mobile.
     
    5. Dispositif mobile selon la revendication 4, dans lequel le réseau de communications mobile comprend un ou plusieurs des réseaux suivants : un réseau GSM, un réseau CDMA, un réseau 3G, un réseau FDMA, un réseau TDMA, un réseau PDC, un réseau TACS, un réseau AMPS, un réseau WCDMA, un réseau TDSCDMA, un réseau WIFI, ou un réseau LTE.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description