1. A method for automatic extraction of objects in video sequences, each object represented by an array of pixels, the method comprising: a. providing at least a first and a second high frame rate video frames; b. performing a reciprocal illumination correction of said first and second video frames to yield respective first and second smoothed frames; c. performing a change detection operation between said first and second smoothed frames to obtain a difference image; and d. performing a local adaptive thresholding operation on said difference image to generate a binary image containing extracted objects, said local thresholding operation using a weight test to determine a boundary of each of said extracted objects, whereby the extraction of said extracted objects by the method is automatic, stable and robust, and whereby no advance knowledge of the video sequences is needed to achieve the extraction.