| 摘要 |
The present invention performs coding with little deterioration in the image quality of a character image when block coding is performed by synthesizing the character image on an image. To achieve this object, an image processing apparatus of this invention includes a generating unit for generating character image data, an image synthesizing unit for synthesizing the character image data and another image data, and a coding unit for block-coding the image data synthesized by the synthesizing unit. In generating the character image data by the generating unit, a size of a unit pixel for forming character image data is a fraction of an even number or an integer multiple of a block size to be block-coded by the coding unit. The synthesizing unit synthesizes the image data such that each unit pixel does not cross a plurality of blocks.
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