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    • 7. 发明公开
    • WATERMARK INFORMATION EMBEDDING APPARATUS, WATERMARK INFORMATION PROCESSING SYSTEM, WATERMARK INFORMATION EMBEDDING METHOD, AND PROGRAM
    • 设备嵌入信息系统水印水印信息和相应程序的处理水印信息嵌入方法
    • EP2439921A1
    • 2012-04-11
    • EP10783421.0
    • 2010-06-02
    • Kagoshima UniversityA.T Communications Co., Ltd.
    • ONO, SatoshiNAKAYAMA, ShigeruTSUTSUMI, Makoto
    • H04N1/387G06T1/00H04N1/32
    • H04N1/32154G06T1/0028G06T2201/0052H04N1/3217H04N1/32315
    • The present invention provides a watermark information embedding device, a watermark information processing system, a watermark information embedding method and program that can provide a two-dimensional code enabling detection of copying. The watermark information embedding device comprises a first wavelet transform unit (12), a watermark information embedding unit (14) and an inverse wavelet transform unit (150). The first wavelet transform unit (12) performs a discrete wavelet transform on an original image of a two-dimensional code and decomposes this into various frequency components, namely an LL component, an LH component, an HL component and an HH component. The watermark information embedding unit (14) embeds the watermark information in the HH component as a high-frequency component in an oblique direction. The inverse wavelet transform unit (150) recomposes the two-dimensional code by performing an inverse discrete wavelet transform on the HH component in which the watermark information is embedded, and on each of the frequency components namely the LL component, the LH component and the HL component.
    • 本发明提供的水印信息嵌入装置,水印信息处理系统,水印信息嵌入方法以及程序也可以提供一个二维码能够复制的检测。 水印信息嵌入装置包括:第一小波变换单元(12),水印信息嵌入单元(14)和逆小波变换单元(150)。 第一小波变换单元(12)进行离散小波变换上的二维码的原始图像和分解成各种频率分量,即LL分量,LH分量,在HL分量和HH分量此。 水印信息嵌入单元(14)嵌入在HH分量中的水印信息作为在倾斜方向中的高频分量。 小波逆变换单元(150)通过执行在逆离散小波,其中水印信息被嵌入HH分量上变换重新组成的二维码,并在每个频率分量即LL分量,LH分量和的 HL分量。