Patent ID: 6625214
Filing Date: 2003-09-23
Classification: G06K,H04N

Abstract:
An apparatus for detecting fade transitions in image data used for image data compression comprising:an inter-frame difference calculation device for calculating an absolute value of a difference at each pixel between two frames, and a sum of absolute values of differences at all pixels of one frame; a pixel block detection device for calculating an absolute value of a difference at each pixel between two pixel blocks, each of which is subdivided from one frame, and detecting a pair of blocks to obtain the minimum value for a sum of absolute values of differences at all pixels of one block; an predictive difference calculation device for calculating a total of sums of the absolute values of differences at all pixels of one block in each pair of blocks detected by said pixel block detection device, for one frame; and a judging device for judging whether said fade transitions are generated or not, on the basis of said sum of the absolute values at all pixels of one frame calculated by said inter-frame difference calculation device and said total calculated by said predictive difference calculation device.