| 摘要 |
This invention provides an image processing method and image processing device capable of detecting a falsification with high accuracy. A watermarked image inputting part 200 includes: a watermark information extracting part 220 for detecting a superposing position of a superposed pattern from a pattern-superposed image having an identifiable pattern superposed on an original image; and an input image deforming part 230 for creating a corrected image of a pattern-superposed image 260 based on information on the detected superposing position. Since an image having a printed sheet scanned is corrected based on the position information on the signal embedded at the time of printing, an image before printing can be restored without distortion and stretching from the image scanned from a printed matter. Accordingly, the correlation of the position between the images can be determined with high accuracy and further a high-performance detection of falsification can be performed.
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