| 摘要 |
PROBLEM TO BE SOLVED: To prevent characters in an image including the characters from being erroneously recognized by character recognition processing. SOLUTION: In document recognition processing for converting character image data in image data into character code data, the character image data in the image data are extracted and whether a color change is generated in the extracted character image data or not is detected. Character image data having no color change are converted into character code data.
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