| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a detection method and detection device of a rear surface watermark.SOLUTION: A detection method is configured to: acquire a pixel pair of a first point of a front surface image and a second point of a rear surface image corresponding to the first point; determine part of a foreground pixel and background pixel; as to four types of the pixel pairs, model four types thereof on the basis of a prescribed characteristic according to the determination result; form four models; as to a non-modeled pixel pair, calculate a degree of similarity between the pixel pair and the four models on the basis of the prescribed characteristic; determine a type of the pixel pair; determine that the second point determined as the background pixel corresponding to the first point determined as the foreground pixel is a rear surface watermark of the rear surface image; and determine that the first point of the front surface image determined as the background pixel corresponding to the second point determined as the foreground pixel is a rear surface watermark of the front surface image.</p> |
