VISUAL SECURITY IMAGE ENCRYPTION METHOD

• Main Authors: WANG, Bin, SHI, Yuandi, WEI, Xiaopeng, ZHANG, Qiang
• Format: Patent
• Language: Chinese; English; French
• Published: 28.03.2024
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

Disclosed in the present invention is a visual security image encryption method based on adaptive block compressed sensing and non-negative matrix factorization. The method comprises: firstly, performing Tetrolet transform on a plaintext image; then optimizing the sparsity of a sparse matrix, and performing matrix scrambling, such that the sparsity in each block division area of an image matrix is equalized; then, calculating a sampling number of the block division area according to image information, constructing and optimizing a measurement matrix, and compressing the image by using an optimized measurement matrix; next, performing scrambling and diffusion operations on a compressed image to complete an encryption process; and finally, embedding the image information into a carrier image by means of non-negative matrix factorization, so as to obtain a visual security ciphertext image. A decryption process is an inverse process of the encryption process. A plaintext image is encrypted by means of the encrypt