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matlab数字图像处理中实现数字水印的加密解密-matlab digital image processing in digital watermarking encryption and decryption
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改程序在MATLAB环境中首先用三维傅立叶变化对一幅图像加密，然后用三维傅立叶逆变换对加密以后的图像解密，从而实现了图像的加密和解密。-Reform program first three-dimensional Fourier transform of an image encryption in MATLAB environment, and then use the three-dimensional inverse Fourier transform of the image after
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matlab实现RSA对图像进行加密（自己手动生成公钥，私钥，按照像素进行加解密）-matlab to achieve the image RSA encryption (to manually generate a public key, private key, according to the pixel encryption and decryption)
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通过三种基本的算法，通过matlab实现图像的加密以及解密，移植性好。(Through the three basic algorithms, through MATLAB to achieve image encryption and decryption, transplantation is good.)
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其使用dct的方法实现图像水印，经检测，其鲁棒性较好，原图像不可见性也较好。包含了加密解密算法，可以实现不需要原图的解密。(The use of dct method to achieve image watermarking, after testing, its robustness is better, the original image invisibility is better. Contains the encryption and decryption algorithms,
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通过级联分数傅里叶变对图像进行加密解密，可自行设置秘钥，以及加密的阶数，具有良好的保密性(Encryption and decryption of image by fractional Fourier transform)
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