中国最大的综合性文献数据库 -维普资讯 关键词: 数字水印 DCT变换 Watson 鲁棒性[gap=951]Key words: digital watermark ; DCT transform ; watson ; robustness
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fast dct transform 快速dct变换
block-DCT transform 块DCT变换
dct transform coding dct变换编码
integer DCT transform 整数DCT变换
Discrete Cosine Transform DCT 离散余弦变换
DCT-Discrete Cosine Transform 离散余弦变换
DCT integer transform DCT整数变换
Combined with FSVQ algorithm, the traditional DCT transform and integer DCT transform are used to improve the performance of image compression.
对经典DCT变换和整数DCT变换进行研究，并把它们和有限状态矢量量化编码算法相结合，提高了对图像的压缩性能。
This method compares the few low frequency DCT transform coefficients of the range blocks and domain blocks to find out the matched domain block.
通过图像块与相似块在DCT变换域少数低频系数的比较，来确定匹配的相似块。
It embeds the watermark bits on the DC of the DCT transform coefficients, for most JPEG quality factor, the method is proved to be robust and effective.
通过对图像做仿jpeg流程的处理，在DCT变换的直流系数上嵌入水印，对于各种常用的JPEG压缩量化因子，可以得到良好的水印嵌入效果。
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