| 摘要 |
A region separation unit separates an inputted color document image into a plurality of types of regions such as a character region, a clip art region and a photo image region, and a clip art region extraction unit identifies the clip art region from among the separated regions. A clip art region dividing unit divides the clip art region based on the color features of the clip art region, and a clip art background identify unit identifies the background portion of the clip art region from among the divided regions. A filling unit for filling portions other than the background of a clip art fills a portion of the clip art other than the background with the background color, and a JPEG compression unit compresses the result obtained from the process for filling a clip art portion.
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