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dwprotected.rar
... for DCT-based watermarking for grayscale images. DCT-based watermark recovering without resorting to the uncorrupted original image. Digital ... sequence of real numbers in a selected set of DCT coefficients. Watermark casting is performed by exploiting the ...
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workingjpeg.zip
JPEG DCT based baseline method which divides the image into 8x8 blocks and quantize anthen entropy coded.
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jpeg.rar
对JPEG的压缩标准进行了仿真，主要过程DCT压缩，根据JPEG的量化矩阵对DCT结果进行量化，对量化结果进行Huffman编码。同时也实现了解压缩过程，即执行上述过程的逆过程。
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irisdctprot.zip
基于DCT的虹膜识别算法， 需要Matlab Signal & Image Processign Toolbox 才可以用
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DCT.rar
利用matlab的DCT2函数，对图像做变换并压缩。并用8*8对图像分块，对每一块计算均方值作为阈值。
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dct_main.zip
DCT C code This is converted from Matlab version
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