| 摘要 |
When a second detector determines that a character image has a halftone (YES in # 1 ) and a third detector ( 48 ) determines that a font size of the character image is equal to or greater than a threshold value beta and equal to or smaller than a threshold value alpha (YES in step # 4 ), a fourth detector determines whether a presently focused pixel constitutes a particular portion of a character (step # 5 ). When the fourth detector determines that the pixel data of the presently focused pixel constitutes the particular portion of the character (YES in step # 5 ), the image processing section sets the pixel data to be subjected to a second screen processing which is performed at a higher gradation level (step # 6 ).
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