EP 1040449 A1 20001004 - METHOD AND APPARATUS FOR CALIBRATING A NON-CONTACT RANGE SENSOR
Title (en)
METHOD AND APPARATUS FOR CALIBRATING A NON-CONTACT RANGE SENSOR
Title (de)
VERFAHREN UND GERÄT ZUR KALIBRIERUNG EINES BERÜHRUNGSLOSEN ABSTANDSSENSORS
Title (fr)
PROCEDE ET APPAREIL POUR CALIBRER UN CAPTEUR D'IMAGES SANS CONTACT
Publication
Application
Priority
- US 9916941 W 19990727
- US 9444498 P 19980728
- US 36003299 A 19990723
Abstract (en)
[origin: WO0007146A1] A method for calibrating a non-contact range sensor comprises the steps of employing the range sensor to obtain a range image of an object to be inspected. The range image is registered with a reference image of the object thereby providing registered data. The reference image may be derived through computer assisted drawing (CAD) data. Normal deviations between the registered data and the reference image are computed. Noise is filtered from the normal deviations. A plurality of bias vectors and a covariance matrix are estimated based on the normal deviations, stored in memory as a lookup table comprising geometric correction factors for the sensor. Images of the object subsequently obtained by the sensor are compensated in accordance with the lookup table.
IPC 1-7
IPC 8 full level
G01B 11/30 (2006.01); G06T 1/00 (2006.01); G06T 7/00 (2006.01)
CPC (source: EP)
Citation (search report)
See references of WO 0007146A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 0007146 A1 20000210; EP 1040449 A1 20001004; JP 2002521699 A 20020716
DOCDB simple family (application)
US 9916941 W 19990727; EP 99935950 A 19990727; JP 2000562864 A 19990727