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Image processing device estimating black character color and ground color according to character-area pixels classified into two classes
Image processing device estimating black character color and ground color according to character-area pixels classified into two classes
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机译:根据分类为两类的字符区域像素来估计黑色字符颜色和底色的图像处理装置
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摘要
A character area is extracted from an original image, which is a digital image, according to a feature value calculated with respect to the original image. Pixels belonging to the extracted character area are classified into a first class and a second class according to colors, in each of blocks divided from the original image. A black character color and a ground color on the original image are estimated according to the classification of the pixels belonging to the extracted character area into the first and second classes. A tone correction is performed to the original image according to the estimated black character color and the estimated ground color so as to adjust a contrast of the black character and the ground in an output image.
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