Fast Response Coding and Optical Encryption of Multiple Color Images in CMYK Color Space
A color image and color space technology, which is applied in the field of optical encryption technology and information security, can solve the problems of degraded image quality, reduced transmission efficiency, and large space occupation, so as to facilitate storage and transmission, resist clipping attacks, reduce effect of influence
Active Publication Date: 2021-11-16
TIANJIN UNIV
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But the problem is that it takes up a lot of space and reduces the transmission efficiency
However, there are also cases where crosstalk noise leads to a serious degradation in the quality of the decrypted image
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[0100] In order to overcome the deficiencies of the prior art, the present invention aims to propose an encryption method for multiple color printing images with a four-channel CMYK color space. For the encryption of color images, an optical encryption method for simultaneously encrypting multiple color images is proposed, which can effectively resist known noise attacks, clipping attacks, plaintext attacks, chosen plaintext attacks, and other cryptographic attacks. For this reason, the technical scheme that the present invention takes is, based on the multiple color image encryption method of CMYK color space, in encryption system, designed a kind of based on FLF (Fresnel transform-linear canonical transform-fractional Fourier transform) The double random phase encoding encryption scheme, different color channels have different encryption processes, resulting in different encryption keys, when the input is multiple color images, each color image corresponds to a different key,...
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The invention belongs to the field of optical encryption technology and information security, and aims at the encryption of color images with four-channel CMYK color space in the full-color printing process, and proposes to effectively resist known noise attacks, shear attacks, plaintext attacks, and selected plaintext A variety of password attack encryption methods such as attacks, the present invention's rapid response coding and multiple color image optical encryption methods in CMYK color space, the input is the original color cyan-magenta-yellow-black CMYK color image, and it is encoded by the quick response coding QR code The encoding process is performed to obtain a color QR code image in the same CMYK color space, and then through the encryption process of Fresnel-linear regularization-fractional Fourier FLF transform, a grayscale encrypted image is output, and three main codes are generated during the encryption process. Key; decryption process: the reverse process of the encryption process. The invention is mainly applied to the occasion of information security encryption.
Description
technical field [0001] The invention belongs to the field of optical encryption technology and information security, and relates to an optical encryption method for multiple color images based on quick response coding and CMYK color space. Background technique [0002] With the continuous development of image acquisition technology and the continuous improvement of acquisition accuracy, it is not uncommon for criminals to collect printed images through high-precision scanners and print them again to produce counterfeit goods and disrupt market order. In the printing process, the CMYK (cyan-magenta-yellow-black) color space is generally used, but the digital images obtained by the scanner are mostly displayed in the RGB (red-green-blue) color space. The use of two different color spaces in the printing and scanning process will inevitably lead to the conversion of the color space of the image during the printing and scanning process, resulting in the transfer or even loss of ...
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IPC IPC(8): H04N1/32H04N1/44H04N19/186H04N19/44H04N19/467
CPCH04N1/32144H04N1/32272H04N1/32309H04N1/44H04N19/186H04N19/44H04N19/467
Inventor 唐晨申玉馨
Owner TIANJIN UNIV