| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an image compression device hardly causing distortion in inter-frame compression and capable of improving a compressibility. <P>SOLUTION: The image compressing device is equipped with a means of dividing the whole image in a frame into blocks of n×m pixels (n, m: natural numbers), a means of finding a difference quantity between data of a block and data of a block of a last frame, a means of outputting one of large, intermediate, and small difference evaluation results according to a result of comparison of the difference quantity with specified thresholds, a data selecting means of selecting and outputting block data divided as output data when the difference evaluation evaluation result shows a large difference, selecting and outputting difference data between the data of the block and the block data of the last frame when an intermediate difference, and outputting no data when a small difference, a means of reversibly encoding and outputting the data outputted by the data selecting means and the difference evaluation result, and a means of putting a new last frame together according to the difference evaluation result. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
