摘要 |
PROBLEM TO BE SOLVED: To enable compatible the reutilization of accumulated images and securement of a free space for an image storage device. SOLUTION: Whether equal to or longer than a predetermined time T1 has elapsed since an image was accumulated in a storage device is determined (step S401); and when it has an elapsed time T1, whether the accumulated image is image data read by a scanner and accumulated is determined (step S402). When the accumulated image is the image read by the scanner and accumulated, the image data compressed by JPEG with Q value=90 are once expanded; the data are recompressed by the JPEG with Q value=50; and the compressed image is restored. When the accumulated image is not image data through the scanner but one input from an external PC or the like via a network, the resolution of the accumulated image is converted from 600 dpi to 300 dpi, and the image is re-stored. COPYRIGHT: (C)2009,JPO&INPIT
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