METHOD OF SELECTING MOVING OBJECT Russian patent published in 2010 - IPC G01S17/06 

FIELD: physics; image processing.

SUBSTANCE: invention relates to passive optical methods of selecting a moving object on a fixed background in an observed scene. The method involves successive recording three images of the monitored space in a sequence of first, second and third time instants and making three contour images from the recorded images. Two differential images are then made by subtracting the first from the second and the first from the third contour image. A selector field is then selected in form of common non-zero areas of the first and second differential images and first and second final images are formed by zeroing areas corresponding to the selector field on the first and second differential images. When the monitored space undergoes such processing, contours of the moving object appear on at least one of the said final images.

EFFECT: method provides highly accurate selection of a moving object independent of change of its brightness relative the background and motion speed.

3 cl, 3 dwg