Image processing apparatus and method
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Abstract
Although a copying machine which has finally output a forged print can be specified by the forgery tracking function, a copying machine which has output an original used for copying or a scanner used to read the images of bills or securities cannot be specified. For this purpose, history information embedded in input image data is extracted. When the history information is extracted, information unique to the apparatus is added to the history information. When no history information is extracted, history information containing information unique to the apparatus is generated. The generated or updated history information is embedded in the image data.
11 Citations
34 Claims
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1-24. -24. (canceled)
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25. An image processing apparatus comprising:
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an input unit arranged to input image data; and
an embedding unit arranged to embed first information and second information in the image data as electronic watermark information, wherein the second information represents the latest information included in the first information. - View Dependent Claims (26)
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27. An image processing method comprising the steps of:
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inputting image data; and
embedding first information and second information in the image data as electronic watermark information, wherein the second information represents the latest information included in the first information.
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28. A computer program product, stored on a computer-readable medium, comprising computer program code for an image processing method, the method comprising the steps of:
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inputting image data; and
embedding first information and second information in the image data as electronic watermark information, wherein the second information represents the latest information included in the first information.
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29. An image processing apparatus comprising:
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an input unit arranged to input image data having a plurality of color components; and
an embedding unit arranged to embed first information and second information in at least one of the plurality of color components in the image data as electronic watermark information, wherein the second information represents the latest information included in the first information. - View Dependent Claims (30, 31, 32)
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33. An image processing method comprising the steps of:
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inputting image data having a plurality of color components; and
embedding first information and second information in at least one of the plurality of color components in the image data as electronic watermark information, wherein the second information represents the latest information included in the first information.
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34. A computer program product, stored on a computer-readable medium, comprising computer program code for an image processing method, said method comprising the steps of:
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inputting image data having a plurality of color components; and
embedding first information and second information in at least one of the plurality of color components in the image data as electronic watermark information, wherein the second information represents the latest information included in the first information.
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Specification