High-capacity encrypted image information hiding method based on block capacity label

Abstract

The invention discloses a high-capacity encrypted image information hiding method based on a block capacity label, which comprises the following steps of: in a secret data hiding stage, processing predicted pixel points in an original image, partitioning an area formed by all the predicted pixel points by a content owner, scrambling all image blocks, and then hiding the image blocks by the content owner; obtaining a block capacity label of each scrambled image block; then correcting the absolute value of the prediction error value of each prediction pixel point in each scrambled image block, and then performing encryption; embedding first additional information and second additional information in the encrypted image according to the block capacity label; the data hider extracts a tag original value sequence from the encrypted image embedded with the additional information, and embeds secret data according to the tag original value sequence; in the secret data extraction and image restoration stage, the receiver extracts the first additional information, the second additional information and the secret data and restores the image; the method has the advantages that the original image can be restored in a lossless manner while the larger embedding capacity is obtained.

Description

technical field [0001] The invention relates to an image information hiding technology, in particular to a large-capacity encrypted image information hiding method based on a block capacity label. Background technique [0002] With the rapid development of network communication technology and digital image processing technology, the transmission and exchange of images is more convenient than ever, but there are more and more security problems. When information (such as digital images) is transmitted on the Internet, there are major security risks such as privacy disclosure, information tampering, and information forgery. Maliciously tampering and then sending it to the receiver, so that the receiver gets wrong information and causes huge losses. Therefore, the security of user's image data has become an important issue in academia and industry. [0003] In the initial stage, researchers use encryption technology to scramble the original information into meaningless gibberi...

AI Technical Summary

Problems solved by technology

When information (such as digital images) is transmitted on the Internet, there are major security risks such as privacy disclosure, information tampering, and information forgery. Maliciously tampering and then sending it to the receiver, so that the receiver gets wrong information and causes huge losses

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