Robust hidden watermark embedding and extracting method for 3D high definition digital videos

A technology for digital video and watermark embedding, which is applied in the cross field and can solve the problems of low robustness and low computational efficiency, and cannot guarantee invisibility well.

Active Publication Date: 2016-11-16
BEIJING UNIV OF TECH
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Problems solved by technology

[0004] In view of the problems that the current 3D digital video watermark embedding and extr

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  • Robust hidden watermark embedding and extracting method for 3D high definition digital videos
  • Robust hidden watermark embedding and extracting method for 3D high definition digital videos
  • Robust hidden watermark embedding and extracting method for 3D high definition digital videos

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[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] The process of the present invention is as follows figure 1 shown, including the following steps:

[0040] Step 1, video resource processing.

[0041] The main function of this step is to decompose the 3D high-definition digital video input by the user into sequence picture frames. Since the ffmpeg library is better for video processing related functions, in order to prevent a large amount of information loss during video function processing, this method selects the ffmpeg library functions to process 3D high-definition video media.

[0042] Step 2, watermark information embedding.

[0043] The algorithm does the same for the left and right channels of a 3D high-definition digital video frame. First, the left and right views of each frame are divided into non-overlapping 8*8 pixel blocks for DCT transformation. The coefficient modulat...

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Abstract

The invention provides a robust hidden watermark embedding and extracting method for 3D high definition digital videos, and belongs to the crossing field of image processing, etc. A user inputs a segment of 3D video, and an algorithm divides the 3D video into sequence frames according to a frame rate thereof and carries out an embedding operation on each frame in the sequence frames. On each frame, the algorithm separately carries out DCT conversion on left and right views with 8 * 8 pixel blocks a unit at first. Each bit in a watermark is sequentially embedded on a pair of 8 * 8 DCT coefficient blocks at the same positions in the left and right channel views. A watermark algorithm selects intermediate frequency areas in the DCT coefficient blocks for embedding and introduces three coefficient limit mechanisms to effectively limit the embedding strength, which are respectively a least identifiable difference perception model, a fine grain modulation parameter and an embedding reference matrix. According to the robust hidden watermark embedding and extracting method provided by the invention, the overall complexity is simplified on the theoretical foundation of the study of the watermarking technology based on single channel video, intensive tasks can be processed and calculated in parallel, the processing speed of the high definition 3D videos is accelerated, and the imperceptibility and the robustness are guaranteed on the premise of achieving the above effects.

Description

technical field [0001] The invention belongs to the intersection fields of image processing, computer graphics and computer vision, and relates to a watermark embedding and extraction method based on a brand-new 3D digital video-oriented robust latent watermarking algorithm. Background technique [0002] With the development of 3D digital photography, 3D terminal, network and communication technology, 3D high-definition digital media has been widely used. The scope covers digital entertainment, distance education, remote industrial control, virtual reality, automatic navigation and many other fields, and its application value is immeasurable. Therefore, how to effectively protect the intellectual property rights of 3D high-definition digital video to avoid unauthorized and illegal use has become an important research topic in the field of information content security in recent years. Digital watermarking technology is an effective way to realize copyright protection of digi...

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Application Information

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IPC IPC(8): H04N21/8358H04N19/625H04N19/176H04N19/467
CPCH04N19/176H04N19/467H04N19/625H04N21/8358
Inventor 张诗阳成聪鑫杨宇辰马伟周心实
Owner BEIJING UNIV OF TECH
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