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    • 9. 发明申请
    • IMAGE PROCESSING APPARATUS, AND IMAGE FORMING APPARATUS
    • 图像处理装置和图像形成装置
    • US20080278763A1
    • 2008-11-13
    • US12108140
    • 2008-04-23
    • Takayuki Aoki
    • Takayuki Aoki
    • H04N1/405G06K15/02
    • H04N1/6072G03G15/0115G03G15/5025H04N1/4053
    • 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 β and equal to or smaller than a threshold value α (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).
    • 当第二检测器确定字符图像具有半色调(#1中为是),并且第三检测器(48)确定字符图像的字体大小等于或大于阈值β并等于或小于 阈值α(步骤#4中为“是”),第四检测器确定当前聚焦像素是否构成字符的特定部分(步骤#5)。 当第四检测器确定当前聚焦像素的像素数据构成字符的特定部分时(步骤#5中为“是”),图像处理部分将要进行第二屏幕处理的像素数据设置为在 较高的灰度级(步骤#6)。