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dcthide

于 2013-11-01 发布 文件大小:15KB
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  dct隐写技术matlab实现资料。算法原理:通过在一个图像块中调整两个DCT系数的相对大小,隐藏秘密信息。 将载体图像分为8×8的块,做二维DCT变换 用来表示选中的两个系数的坐标对于第i bit秘密信息 if(要隐藏信息‘1’) make else make 逆DCT变换,还原图像 (dct steganography matlab implementation information. Algorithm principle: an image block by adjusting the relative size of the two DCT coefficients, hidden secret information. The vector image is divided into 88 blocks, making two-dimensional DCT transform coefficients used to represent the coordinates of the selected two for the first i bit secret information if (to hide information ' 1 ' ) make else make the inverse DCT, restore image)

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