| 摘要 |
An image processing controller for performing screen processing for tone reduction of input image data, which has a tone value in N1 tones (where N1 is an integer that is greater than or equal to four) for each pixel, from the N1 tones into N2 tones (where N2 is an integer that is greater than or equal to three but less than N1) and generating output image data that is to be supplied to a printing unit, the printing unit being configured to be able to form an output image with the use of a recording material in accordance with the output image data, the output image data having N3 tones greater than the N2 tones of intermediate image data (N3 is an integer that is greater than N2), the intermediate image data being generated as a result of the screen processing performed on the input image data.
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