| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method and device for companding image data that provides a high compression rate. SOLUTION: An image in an area is divided to images in areas, a specific number is given to each of them (image data division section 12), by comparing the divided images (image data comparison section 13) the specific number of the image data is replaced with the specific number of the compared image data when the image data are the same with each other. When the image data are different, the similar processing is applied to images of areas that result from further image division so as to compress the images (image data compression section 14). Furthermore, by using the specific number provided to the compared image data for reference destination address data the image data that are omitted because the data are coincident with the image data before the division can be reproduced (image data expansion section 15).</p> |
