| 摘要 |
PROBLEM TO BE SOLVED: To create retrievable high compression data while maintaining image quality. SOLUTION: A character part is extracted from a binary image (S3), a binary character image in which pixels other than the character part are replaced with white pixels is generated (S4), a non-character multilevel image in which the pixels of the character part in the multilevel image are painted with a background color is generated (S7) and the binary character image comprising colors constituting the character part is generated (S6). In addition, character recognition processing is performed to at least one of the multilevel image and the binary character image comprising each determined color and a character code is acquired (S10). Then, the non-character multilevel image and the binary character image comprising each determined color are encoded, respectively and filed with the character code (S11). Thus, the retrievable high compression data is created while maintaining the image quality. COPYRIGHT: (C)2005,JPO&NCIPI
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