Video dual watermark method based on SVD and QR codes

Abstract

The invention provides a video dual watermark method based on SVD and QR codes. The method comprises the steps of watermark embedding and watermark extracting. Watermark embedding comprises the steps of Arnold scrambling, original video preprocessing, grayscale watermark embedding, reconstructing, grayscale watermark text information QR coding and QR code embedding. Watermark extracting comprises the steps that a key1 is used to acquire a watermark carrier image; mark extracting and Arnold inverse scrambling are carried out; a key2 is selected, and the image block of the QR code is hidden; and the QR code is decoded to acquire verification text information. According to the invention, embedded dual watermarks have the advantage of small mutual interference and good robustness for common attacks; the QR code information is embedded into the image block which is highly invisible; the safety of a video watermark algorithm is enhanced; and the problem of single function of a single robust watermark algorithm is effectively solved.

Description

technical field [0001] The invention relates to information hiding technology, in particular to a video double watermark method based on SVD and QR codes. Background technique [0002] Network information technology has been developing rapidly all over the world, which greatly facilitates the communication and exchange between people. With the rapid development of Internet technology and digital multimedia technology, a large amount of multimedia data can be easily accessed, copied and disseminated by people through the network. Therefore, people pay more and more attention to finding an effective method to solve the copyright protection problem of multimedia data. The existing watermarking algorithms are not ideal. For example, based on the space-time multi-resolution characteristics of 3D wavelet transform, the spread-spectrum watermark is adaptively embedded into the 3D wavelet coefficients. The robustness is good, but the real-time performance is poor and The watermark...

AI Technical Summary

Problems solved by technology

However, the disadvantages of this algorithm are: the embedded message is longer than the time spent; it can only process simple stream format files; in order to meet the visibility of the watermark, the embedded watermark intensity is allowed to be low, and it is sensitive to various operations in the airspace; the basic LSB algorithm is resistant to JPEG Weak compression ability; poor robustness, etc.

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