Transformation domain printing-scanning resistant digital watermarking method based on computer-generated holography
A technology that resists print scanning and digital watermarking, applied in computing, image data processing, image data processing, etc., to achieve the effect of accurately determining copyright
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[0034] The invention combines QR two-dimensional code, double random phase modulation encryption technology, conjugate symmetric continuation Fourier calculation holographic technology and wavelet transform technology, uses QR two-dimensional code as the original watermark information, and converts the preprocessed QR two-dimensional code information As a binary watermark, double random phase modulation encryption is carried out, and finally the amplitude and phase information of the encrypted complex image is recorded by using conjugate symmetric continuation Fourier computational holography technology, and the watermark hologram is obtained. The holographic image generated in this way is theoretically without any noise after holographic decryption and double random phase modulation decryption, which increases the robustness of the watermark algorithm; the use of double random phase modulation encryption technology increases the watermark algorithm. Security; QR two-dimensiona...
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