Image protection method and device, and image restoring method and device

Abstract

The invention provides an image protection method and device, and an image restoring method and device. The image protection method comprises steps of acquiring a watermark image and a to-be-protectedcolor image; embedding the watermark image into the to-be-protected color image so as to obtain an embedded image; and encrypting the embedded image to obtain an encrypted embedded image. According to the invention, by embedding the watermark image into the to-be-protected color image, through the watermark image, protection is performed on the to-be-protected color image; after the embedding, the embedded image is encrypted for two times, wherein pixel distribution is disrupted once and pixel values are corrected once; multiple times of protection is performed on the to-be-protected color image; after the pixel values are corrected, an attacker fails to directly obtain any information of the to-be-protected color image from the encrypted embedded image; the process of restoring the to-be-protected color image from the encrypted embedded image is complex and the breaking difficulty is big; and in the image restoring process, user identity identification is performed through the watermark image, and after the identification passes, the to-be-protected color image is restored, so the safety of the to-be-protected color image is greatly improved.

Description

technical field [0001] The present invention relates to the technical field of image processing and encryption, in particular to an image protection method and device, and an image restoration method and device. Background technique [0002] At present, users often share images through social networks, and sometimes images involve user privacy. In order to prevent image content from being leaked, images need to be encrypted before sharing. [0003] At present, in related technologies, the user usually sets a password, encrypts the image through the password to obtain the ciphertext data corresponding to the image, and then transmits the ciphertext data to the receiving end through the network, and the user uses instant messaging or mobile network, etc. way to send the above password to the receiving end. The receiving end decrypts the received ciphertext data through the password to obtain the image, although this type of method can protect the image content to a certain ex...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the embodiments of the present invention is to provide an image protection method and device, and an image restoration method and device, to solve the following problems in the prior art: the prior art encrypts the image through a password set by the user himself, and the encryption Images are easily intercepted or compromised by malicious actors, which will lead to the leakage of image content and bring losses to users. The security of images is very low

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