Blind watermark embedding and extracting method of stereoscopic video image

Abstract

The invention discloses a blind watermark embedding and extracting method of a stereoscopic video image; the stereoscopic video image is divided into image blocks which are not overlapped mutually, discrete cosine transformation and two-level discrete wavelet transformation are carried out to all image blocks, the relation of numerical values of the discrete cosine transformation direct-current coefficients and two-level discrete wavelet transformation low-frequency coefficients of a left viewpoint view and a right viewpoint view of the stereoscopic video image is analyzed, so as to define the internal relationship of the image blocks and interblock relationship of two image blocks in the stereoscopic video image; a watermark embedding mode is determined though the relationships and a waythat whether the watermark information is consistent, wherein the data of the primary stereoscopic video image is not changed when relational embeddedness is carried out, the discrete cosine transformation direct-current coefficient of the image block with small correction magnetite of the discrete cosine transformation direct-current coefficient is corrected when quantization embeddedness is carried out, in this way, the quality of the stereoscopic video image is ensured, when watermark is extracted, no primary stereoscopic video image is needed, so as to realize blind detection.

Description

technical field [0001] The invention relates to a digital watermark technology, in particular to a method for blind watermark embedding and extraction of stereoscopic video images. Background technique [0002] Stereoscopic video images show the information of a certain scene or object at different angles at the same moment, which increases the depth information of the scene and enhances the sense of visual reality and lifelikeness. Therefore, the stereoscopic video system has broad application prospects in fields such as stereoscopic television, three-dimensional video conferencing, telemedicine and special effect advertisements. With the advent of three-dimensional movies, the illegal duplication and dissemination of some high-end works have threatened intellectual property rights. Therefore, copyright protection measures for stereoscopic video images are very necessary. [0003] Digital watermarking technology can well embed certain secret information in digital product...

AI Technical Summary

Problems solved by technology

However, the existing digital watermarking technology is mainly aimed at two-dimensional images, and how to apply digital watermarking technology to stereoscopic video images has become a problem that needs a breakthrough

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