| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve an electronic watermark embedding processing for guaranteeing calculation of a same unique ID from a plurality of images where different pieces of electronic watermark information are embedded respectively. <P>SOLUTION: Random signal sequence calculation means 11 generates random signal sequences of the number as the same as the number of bits of the watermark information bit data. Correlation value calculation means 12 calculates correlation values between input images and the random signal sequences. Watermark signal coefficient determination means 13 determines coefficients for the correlation values by inputting threshold information and watermark information bit-data. Watermark signal addition means 14 adds values obtained by multiplying the coefficients determined by the watermark signal coefficient determination means 13 to the random signal sequences to pixel values of input images as watermark signals and outputs them as watermark embedded images. <P>COPYRIGHT: (C)2013,JPO&INPIT |
