| 摘要 |
<P>PROBLEM TO BE SOLVED: To balance, at a given level, between maintenance of high image quality by securing an image information amount of an original and a reduction in a storage amount and in processing time of image data. <P>SOLUTION: Resolution reduction processing is performed to original image data 21 with a high resolution input from a scanner (S2). A future amount 23 indicating changing degree of an image in a target pixel to an obtained reduced image 22 is calculated (S3). Control information related to a partial pixel of the original image is extracted by using the obtained future amount 23 and the original image data 21 (S4). Then, expanding/combining processing is performed by using the reduced image 22, partial original image data and control information 24 (S5). The expanding/combining processing combines an expanded image 25 with the same high resolution as that of the original image and replaces the pixel of the original image with the pixel of the expanded image at the corresponded position of the expanded image if there is the original image to be partially stored in reference to the control information. <P>COPYRIGHT: (C)2004,JPO |
