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

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...

AI Technical Summary

Problems solved by technology

[0004] In view of the problems that the current 3D digital video watermark embedding and extraction schemes cannot guarantee the invisibility, robustness and low computational efficiency

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