5、数字水印技术应用举例 5.1 数字图像中加数字水印 这里主要介绍数字图像中加数字水印的两种方法: 基于DCT ( DCT-Based )的和基于 多分辨率(Multiresolution-Based)的水印技术。
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Progressive DCT-based 累进的基于DCT
Sequential DCT-based 顺序的基于DCT
dct based dct域
DCT-based downsampling DCT域下采样
DCT-based compressed domain 离散余弦变换压缩域
block-based dct 分块dct
Compared with DCT-based system, DWT-base watermark system is an adaptive system.
相比较DCT系统,DWT水印系统可以实现水印的自适应嵌入。
Block-DCT-based video compression scheme has been used widely in digital video system.
基于分块dct的视频压缩方法在数字视频系统中得到了广泛的应用。
Embedded the watermark information into intermediate frequency in the DCT-based watermark algorithm by seek the feature field.
在基于DCT的数字水印算法中通过寻找特征区域将水印嵌入在能量最大的离散余弦系数中;
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