| 摘要 |
An apparatus for detecting a character writing area inputs a plurality of images of written documents respectively having different characters recorded thereon to an existing document. The apparatus produces a common image and a differential image, based on the input images. By using of the common image and the differential image, a character-writing-areas are detected and an attribute is set for each of the areas. A format used for the written document is produced by using of the character-writing-areas and set attributes.
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