ANALYSING A MOVING IMAGE

摘要

In a moving picture, pixel values are a function of both space and time. A measure of visual significance is generated by taking the pixel along with a second, nearby, randomly chosen pixel (though its temporal offset from the first may be fixed) and comparing these with a comparison pixel pair. The comparison pair are randomly selected from the image (though its temporal offset may be fixed) but the spacial and temporal displacement between the members of the comparison pair is the same as between the numbers of the test pair. Further comparison pairs are then chosen, and the measure generated depends on the number of matches obtained in the comparisons. A third pair may also added. Also, the pairs may be replaced by groups of more than two.