Multi-image encryption method based on vector quantization and interference

• Main Authors: SUI LIANSHENG, CHENG YIN, WANG ZHANMIN, XU MINJIE
• Format: Patent
• Language: Chinese; English
• Published: 22.10.2019
• Subjects: CALCULATING; COMPUTING; COUNTING; HANDLING RECORD CARRIERS; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS; PRESENTATION OF DATA; RECOGNITION OF DATA; RECORD CARRIERS

The invention discloses a multi-image encryption method based on vector quantization and interference. The multi-image encryption method comprises the following steps: 1) repeatedly iterating a clustering algorithm among image vectors formed by sub-square blocks to generate a representative codebook; 2) expressing the QR code of the original image as an index image by using the index of the code word in the codebook; regarding the codebook as an index table, referring to the index table, and reconstructing the original information of the QR code from the compression result; 3) when all the index images are obtained, using space multiplexing to obtain intermediate temporary distribution; extracting a small part of the plurality of encrypted images by using a random binary amplitude mask, and combining the small parts into a ciphertext image; and 4) encoding the integral image of the index image into a pure phase mask and an amplitude mask, and constructing an initial complex function byusing a random phase mas