文件名称:tiquzhifangtu
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利用小波变根据二进制数（水印）来改变图片，提取其中一个子带的直方图
-Using Wavelet changed according to binary number (watermark) to change the picture, extract one of the histogram of subband
-Using Wavelet changed according to binary number (watermark) to change the picture, extract one of the histogram of subband
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tiquzhifangtu.m