| 摘要 |
PROBLEM TO BE SOLVED: To provide an image processing unit that adopts an error spread method by which production of a pseudo contour caused on the basis of delayed dots can be prevented. SOLUTION: The image processing unit receives an error spread from neighboring pixels, corrects a pixel value (input value) of a pixel being a processing object and then applies processing to reduce the gradation to the corrected pixel value. Then a sbutractor section 107 calculates the error attended with the reduced gradation and spreads the error to the neighboring pixels. In this case, only when the input value is 0.5 or over, inverting sections 101, 109 multiply -1 with the error from the neighboring pixels and the error to be spread to the neighboring pixels. According to the processing above, delayed dots can be prevented so as to prevent occurrence of a pseudo contour.
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