Method and apparatus for detecting object movement within an ima

Details Method and apparatus for detecting object movement within an ima Method and apparatus for detecting object movement within an ima

1996-12-11

1998-12-08

Chin, Tommy P.

Television

Special applications

Observation of or from a specific location

348155, H04N 718

Patent

active

058477551

ABSTRACT:
Method and apparatus for processing a sequence of images to detect object movement within the sequence. Specifically, the method comprises the steps of: (a) supplying a sequence of image frames; (b) initializing a reference image that contains image information regarding stationary objects within a scene represented by the sequence of images; (c) supplying a next image frame which temporally follows the sequence of image frames; (d) comparing the next image to the reference image to produce a motion image representing motion information regarding movement of objects within the scene; (e) updating the reference image with information within the next image that represents stationary objects within the scene; and (f) repeating steps (c), (d), and (e) for each next image supplied. The method is implemented by image processing apparatus. A specific embodiment of the method and apparatus is a traffic monitoring system that identifies vehicles in varying illumination levels and eliminates erroneous identification of non-physical movement in the scene such as shadows and headlight reflections.

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