Multi-functional digital watermarking method for three-dimensional picture

Abstract

The invention discloses a multi-functional digital watermarking method for a three-dimensional picture. The multi-functional digital watermarking method for the three-dimensional picture includes watermark embedding, watermark extraction and temper localization, to be specific, using the similarity between the characteristic watermark extracted from the left viewpoint picture of an attacked three-dimensional watermark picture and a robust watermark and the similarity between the characteristic watermark extracted from the left viewpoint picture of the attacked three-dimensional watermark picture and a robust watermark as evaluation bases to realize the copyright protection for the three-dimensional picture; locating tempering blocks in the left viewpoint picture and the right viewpoint picture of the attacked three-dimensional watermark image in two steps, for non-matched blocks, realizing the temper detection through judging whether there is a set numerical linear relationship between two corresponding high-frequency DCT coefficients in a DCT coefficient matrix of each non-matched block, and for matched blocks, using characteristic watermarks and embedded fragile watermarks extracted from the matched blocks to realize the temper detection so as to realize the temper localization function of the three-dimensional image.

Description

technical field [0001] The invention relates to a digital watermark technology, in particular to a multi-functional three-dimensional image digital watermark method. Background technique [0002] With the continuous development and popularization of digital media and network technology, plane image processing technology has become mature and has been widely used in people's study, life and work; however, with the improvement of people's quality of life, plane Images can no longer satisfy people's visual enjoyment, but stereoscopic images provide depth information to enhance the realism of images, give users an immersive feeling, and increase people's interest and awareness of things. As an emerging digital media, stereoscopic image / video is called the fourth-generation media form after audio, image, and video. Therefore, the market demand for the development and application of the stereoscopic image processing system is becoming more and more urgent. However, some problems ...

AI Technical Summary

Problems solved by technology

[0003] The use of watermarking technology can effectively improve a series of problems such as infringement, copying and tampering of stereoscopic images. At present, there are many watermarking algorithms, and the single watermarking algorithm often has a single function; the robust watermarking algorithm has good robustness and has the ability to resist attacks. , can realize the copyright protection function, but it is not sensitive enough to the tampering operation, the tampering detection and positioning ability is poor, and it is difficult to realize the content authentication; the fragile watermark algorithm is just the opposite, it is very sensitive to the tampering operation, the tampering detection and positioning ability is strong, and it is easy to realize the content Authenticated, but not resistant to attacks

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