| 摘要 |
An original document image is inputted as multi valued image data (original image data) from an input unit. The multivalued image data is binarized by a binary image generation unit. Then, layout analysis is performed based on the binary image data. Based on the layout information, a partial image having text-attribute is extracted and a partial image having non-text-attribute are extracted from the multi-valued image data. One of the partial images is encrypted, and the encrypted data is stored with the partial image that is not encrypted and the layout information.
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