Multi-image encryption and decryption method based on light-field imaging and digital refocusing techniques

Abstract

The invention relates to a multi-image encryption and decryption method based on light-field imaging and digital refocusing techniques. Multiple plaintext images are encrypted at the same time by constructing a light-field imaging encryption system composed of a micromirror array and a discrete image receiver arranged behind the micromirror array; the secrete using complexity in the encryption process is reduced; the network image transmission load is effectively reduced; the encryption is improved, moreover, the original image information can be recovered through decryption due to existence of redundant information when partial information is lost; and the anti-interference performance of the plaintext encryption method is reduced. After light-field imaging encryption is carried out, the image array can be encrypted again or for many times by taking each sub-image in the obtained encryption images as an element, the nonlinearity and randomness of the plaintext images in a space domain and a change domain are improved, and the security of the encryption method is greatly improved.

Description

technical field [0001] The invention relates to an image processing technology, in particular to a multi-image encryption and decryption method based on light field imaging and digital refocusing technology. Background technique [0002] With the rapid development of the Internet, more and more attention has been paid to information and data integration processing technology. In the processing and application of data, information is often transmitted through the network, and the improvement of the convenience of information transmission brings with it hidden dangers of information security. As a form of data information, the importance of image security has also received extensive attention. As a form of guarantee for image information security, image encryption has been paid more and more attention. [0003] The traditional image encryption algorithm is essentially a security algorithm, mostly based on chaos theory, such as using a permutation-confusion structure to encry...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problems existing in light field image encryption, and proposes a multi-image encryption and decryption method based on light field imaging and digital refocusing technology, which can encrypt and decrypt multiple images at the same time, so that the encryption process key can be used The complexity is reduced, which effectively reduces the network image transmission load and improves encryption efficiency; at the same time, due to the existence of redundant information, in the case of partial information loss, the original image information can still be recovered through decryption, which is a high application value Image Encryption Method

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