A Color Digital Image Watermark Embedding and Extraction Method Based on Compressive Sensing

Abstract

According to the invention, first, an image block of which the complexity is higher than a set threshold in an image is chosen as an embedding target by use of a partitioning strategy; then, wavelet transform and compressed sensing transform are performed on the target block and a watermark image to get a measured value matrix; next, singular value decomposition and replacement is performed on the measured value matrix to complete a watermark information embedding process; and finally, wavelet inverse transform is performed to get a watermarked color image. There is no need for an original carrier image to participate in the extraction of a watermark image, and blind extraction of watermark information is realized. The watermarking method has the advantages of good concealment performance, high safety, strong robustness and the like under the premise of guaranteeing the security of watermark information.

Description

technical field [0001] The invention relates to the field of digital images, more specifically, to a method for embedding and extracting color digital image watermarks based on compressed sensing. Background technique [0002] With the popularization of network and multimedia, the application of digital image information is more and more extensive. However, the problems of security and copyright protection of multimedia information are also highlighted. The proposal of digital watermark technology provides an effective way to solve these problems. [0003] However, most of the current digital watermarking techniques are grayscale image watermarking algorithms, and the research on digital image watermarking algorithms for color image anti-counterfeiting is rare. At the same time, the current digital watermarking algorithm has problems such as simple method, unstable algorithm, and easy to be disturbed by noise, resulting in poor watermarking effect, or even unable to extract...

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Problems solved by technology

[0003] However, most of the current digital watermarking technologies are grayscale image watermarking algorithms, and the research on digital image watermarking algorithms for color image anti-counterfeiting is rare.

At the same time, the current digital watermarking algorithm has problems such as simple method, unstable algorithm, and easy to be disturbed by noise, which leads to the poor effect of the extracted watermark, or even cannot extract the watermark information at all, and cannot play a good role in anti-counterfeiting.

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