EP 1072028 A1 20010131 - METHOD AND DEVICE FOR DETECTING MOTION
Title (en)
METHOD AND DEVICE FOR DETECTING MOTION
Title (de)
VERFAHREN UND VORRICHTUNG ZUM ERFASSEN VON BEWEGUNGEN
Title (fr)
PROCEDE ET DISPOSITIF POUR LA DETECTION DE DEPLACEMENTS
Publication
Application
Priority
- DE 19749136 A 19971106
- EP 9805929 W 19980917
Abstract (en)
[origin: DE19749136A1] The invention relates to a method for detecting motion in a scene, characterised by the following steps: (a) determining two chromatic values (H1, H2) of a scene point by measuring the brightness (H1i, H2i) of the point in at least n different spectral regions at two different times, where n is an integer number >/=2, (b) determining a first and a second vector (h1, h2) in an n'-dimensional vector space, for the two chromatic values, by means of measured brightness values (H1i, H2i), where 2</=n'</=n, (c) determining the distance of the end point of the second vector (h2) to a straight line defined by the first vector (h1), and (d) deciding that motion occurred when the distance exceeds a predetermined threshold value ( epsilon ). The invention also relates to a device for implementing such a method. Considering that the brightness values are taken into account and related to different spectral regions, the existence of motion in the scene can be evaluated more safely than when the overall scene brightness is observed in visible light.
IPC 1-7
IPC 8 full level
G08B 13/194 (2006.01)
CPC (source: EP)
G08B 13/19602 (2013.01); G08B 13/1961 (2013.01)
Citation (search report)
See references of WO 9924949A1
Designated contracting state (EPC)
AT BE DE ES FI FR GB IT NL SE
DOCDB simple family (publication)
DE 19749136 A1 19990527; DE 19749136 C2 20000127; CN 1278939 A 20010103; EP 1072028 A1 20010131; WO 9924949 A1 19990520
DOCDB simple family (application)
DE 19749136 A 19971106; CN 98810920 A 19980917; EP 9805929 W 19980917; EP 98951430 A 19980917