MOTION DETECTOR, IMAGE PROCESSING SYSTEM, MOTION DETECTING METHOD, PROGRAM, AND RECORDING MEDIUM

摘要

Accurate detection of stationary image regions and motion image regions has been difficult in the areas where the image varies gradually. Provided is a motion detecting apparatus comprising: small-amplitude area detecting means 9 of detecting the amplitude amount of the image of a predetermined pixel vicinity area of an image containing a predetermined pixel; motion information extracting means 10 of detecting the time-dependent change amount of the image; comparing means 2 of determining whether at least the predetermined pixel is a motion pixel or not on the basis of the detected change amount; and motion pixel counting means 3 and motion signal generating means 11 of generating a motion signal corresponding to predetermined pixel, on the basis of the result of determination; wherein when detected amplitude amount is smaller, at least the gain for the change amount corresponding to predetermined pixel is corrected into a greater value, so that the time-dependent change amount of image is detected.