| 摘要 |
PROBLEM TO BE SOLVED: To provide an image processing method capable of more correctly determining falsification of image data, an image processing apparatus, and to provide an image processing program and a storage medium. SOLUTION: The image processing method is used to determine whether image data having embedded gray-coded electronic watermark data of a predetermined bit length have been tampered. The processing method has: a means for extracting the electronic watermark data from the image data which are tampered or not tampered; and a comparison processing step for determining that the image data are not tampered at arbitrary one bit if the arbitrary one bits do not match to each other in comparison between the extracted electronic watermark data and the electronic watermark data of a predetermined bit length, and determining that the image data have been tampered if arbitrary two or more bits do not match. COPYRIGHT: (C)2009,JPO&INPIT
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