| 摘要 |
A document reading apparatus and an image formation apparatus are disclosed. The document reading apparatus detects a locally patent image pixel in a main scanning direction, determines whether locally patent image pixels continuously appear at the same pixel position in the main scanning direction, and counts the number of lines on which locally patent image pixels continuously appear at the same position in the main scanning direction. When the number exceeds a predetermined value, pixel values of locally patent image pixels detected afterwards at the same position in the main scanning direction are removed. If a locally patent image is not detected, the counted number of lines is initialized.
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