Blind watermark embedding and extracting method of stereoscopic video image

A technology for embedding stereoscopic video images and watermarks, which is applied in stereoscopic systems, image communication, image data processing, etc.

Inactive Publication Date: 2011-10-19
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing digital watermarking technology is mainly aimed at two-dimensional images, and how to...

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  • Blind watermark embedding and extracting method of stereoscopic video image
  • Blind watermark embedding and extracting method of stereoscopic video image
  • Blind watermark embedding and extracting method of stereoscopic video image

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Embodiment 1

[0062] The blind watermark embedding method of a kind of stereoscopic video image that present embodiment proposes, it mainly comprises the following steps:

[0063] ①At the watermark embedding end, let S org is the original stereoscopic video image of size M×N, the original stereoscopic video image S org Including the left view image and the right view image, denote the original stereoscopic video image S org The left view point image of L is org , denote the original stereoscopic video image S org The right view image of R org , the original stereoscopic video image S org The left view image L of org and the original stereoscopic video image S org The right view image R of org Divide into (M×N) / (n×n) non-overlapping image blocks of size n×n respectively, the original stereoscopic video image S org The left view image L of org The i-th image block in is denoted as The original stereoscopic video image S org The right view image R of org The i-th image block in is...

Embodiment 2

[0084] This embodiment proposes a blind watermark extraction method for a stereoscopic video image embedded with a watermark using the blind watermark embedding method given in Embodiment 1, which mainly includes the following steps:

[0085] ① At the watermark extraction end, let S wat is a stereoscopic video image to be detected with a size of M×N, and the stereoscopic video image S to be detected wat Including the left viewpoint image and the right viewpoint image, record the stereoscopic video image S to be detected wat The left view point image of L is wat , remember the stereo video image S to be detected wat The right view image of R wat , the stereoscopic video image S to be detected wat The left view image L of wat and the stereoscopic video image S to be detected wat The right view image R of wat Divide into (M×N) / (n×n) non-overlapping image blocks of size n×n respectively, and the stereoscopic video image S to be detected wat The left view image L of wat Th...

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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...

Claims

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Application Information

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IPC IPC(8): H04N13/00G06T1/00
Inventor 郁梅吴爱红蒋刚毅
Owner NINGBO UNIV
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