Video watermarking method based on depth image and Otsu segmentation

Abstract

The invention discloses a video watermarking method based on a depth image and Otsu segmentation. The method comprises the steps of obtaining the depth image of a video keyframe, scrambling a watermark picture through Logistic mapping to generate disordered one-dimensional watermark information, segmenting the depth image into a foreground region and a background region through an Otsu threshold segmentation method according to depth-of-field information provided by the depth image, judging the foreground region of the video keyframe, embedding the watermark information in a DCT coefficient of luminance component subblocks belonging to the foreground region, judging the foreground region and the background region of a video containing a watermark and extracting the watermark information from the DCT coefficient of the luminance component subblocks belonging to the foreground region. According to the video watermarking method, the embedded region of the watermark is determined according to the depth information of the video keyframe, so the problem that scene spatial position relativity is not considered in a human visual system is effectively solved, and good robustness to attacks of pepper and salt noise, multiplicative noise, gaussian noise, luminance contrast adjustment and the like is achieved.

Description

technical field [0001] The invention relates to a video watermarking method, in particular to a video watermarking method based on depth images and Otsu segmentation, and belongs to the technical field of video information security. Background technique [0002] With the rapid development of digital technology and the wide application of the Internet, people have gradually been brought into the digital age. Driven by "high-definition, 3D, and user-generated content (UGC)", the emergence of massive video and audio information has also spawned increasingly rampant illegal piracy and content tampering, which has brought huge economic losses to the society. many safety hazards. Therefore, video watermarking technology has been one of the current research hotspots. [0003] In the embedding process of watermark information, according to the embedding position of watermark information, it can be divided into time (space) domain digital watermark and transform domain digital wate...

AI Technical Summary

Problems solved by technology

The present invention uses the depth image depth information to select the watermark embedding area, which can effectively solve the problem that the spatial position correlation of the scene is not considered in the human visual system, and is effective against attacks such as salt and pepper noise, multiplicative noise, Gaussian noise, and brightness contrast adjustment. Better robustness, providing a new idea for video watermarking technology

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