| 摘要 |
An image processing apparatus has an image input section, a color image processor, a monochrome image processor and an image synthesizer. The image input section inputs image data of an original image. The color image processor generates color image data by performing color image processing on the image data. The monochrome image processor generates monochrome image data by performing monochrome image processing on the image data. The monochrome image data has a bit size per pixel smaller than the color image data. The image synthesizer generates synthesized image data by synthesizing the monochrome image data with the color image data. The synthesized image data has a bit size per pixel equivalent to the color image data. The apparatus also has a buffer that temporarily stores image data, a determination section that determines on the basis of the image data of the original image whether the original image is color or monochrome, and an output controller that controls an image output process. The output controller stores output image data outputted by the image synthesizer into the buffer when an auto color select mode is selected. The output controller outputs output image data fetched from the buffer when the determination section has determined that the original image is color. Also, the output controller outputs the monochrome image data that is sampled from the image data fetched from the buffer when the determination section has determined that the original image is monochrome.
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