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    • 10. 发明授权
    • Robust blind watermarking method in wavelet DC components
    • 小波直流分量中的鲁棒盲水印方法
    • US06934403B2
    • 2005-08-23
    • US10029835
    • 2001-12-31
    • Sanghyun JooYong-Seok SeoYoung Ho SuhWeon Geun Oh
    • Sanghyun JooYong-Seok SeoYoung Ho SuhWeon Geun Oh
    • H04N5/913G06T1/00G06K9/00
    • G06T1/0057G06T2201/0052G06T2201/0083
    • An apparatus and method for embedding and extracting digital watermarks using a blind mode based on wavelet transform which is robust to external attacks while being capable of minimizing a degradation in picture quality caused by embedding of the watermarks. In accordance with the invention, watermarks protection of the copyright for desired data are embedded in DC component domains of wavelet-transformed domains. In accordance with the invention, embedding of watermarks in a target image corresponding to a target domain in which the watermarks are to be embedded, is achieved by generating a data stream of the watermarks in accordance with a key value selected by the user, generating index information representing positions where the watermarks are to be embedded, in accordance with a key value selected by the ser, and reflecting the watermark data stream on data values of pixels in the target image at the positions based on the index information.
    • 一种使用基于小波变换的盲模式嵌入和提取数字水印的装置和方法,该小波变换对于外部攻击是鲁棒的,同时能够最小化由嵌入水印引起的图像质量的劣化。 根据本发明,水印保护期望数据的版权被嵌入到小波变换域的DC分量域中。 根据本发明,通过根据用户选择的键值产生水印的数据流,将水印嵌入在与要嵌入水印的目标域相对应的目标图像中,产生索引 根据由该服务器选择的键值来表示要嵌入水印的位置的信息,并且基于该索引信息,将该水印数据流反映在该目标图像中的像素的数据值上。