Robust watermark embedding and detection method and device

Abstract

The embodiment of the invention provides a robust watermark embedding and detection method and device, and relates to the technical field of digital information content and copyright protection. The robust watermark embedding method includes the following steps: according to a plurality of pieces of frame fingerprint information corresponding to multiframe video content, converting watermark information that needs to be embedded into a plurality of pieces single-bit watermark information, the frame fingerprint information and the single-bit watermark information being in one-to-one correspondence; according to each piece of frame fingerprint information, generating a watermark matrix corresponding to each piece of single-bit watermark information; and according to each watermark matrix, embedding the single-bit watermark information in a frame of video content corresponding to the watermark matrix corresponding to the single-bit watermark information and generated according to the frame fingerprint information, and generating watermark video information. The method is employed to perform watermark embedding, robustness of watermarks can be enhanced, watermarks are guaranteed not to become invalid when a video is subjected to an analog conversion attack, and a pirate source can be searched according to the embedded watermarks.

Description

technical field [0001] The invention relates to the technical field of digital information content and copyright protection, in particular to a robust watermark embedding and detection method and device. Background technique [0002] The illegal acts of film piracy have been repeatedly banned, which has seriously damaged the development of the film and television industry. At present, there is no effective method to locate the source of copyright piracy in China for pirated movies in digital theaters. The main reason is that the existence and integrity of the watermark are greatly affected when the existing video digital watermarking technology fights against camera piracy based on D / A conversion, and it does not have the ability to resist such attacks. At present, there is no recognized and reliable method for video-based robust watermarking. The more mature and successful schemes of robust watermarking are concentrated in the field of resisting digital conversion attacks,...

AI Technical Summary

Problems solved by technology

[0003] Since the video propagates through an unknown and random optical path during the process of being attacked by piracy, its imaging quality may be affected by refraction and diffuse reflection according to the principle of light propagation, which will bring a lot of natural light noise, making the QIM method often add such After random noise, the signal point strength jumps out of the quantization range, making the watermark invalid

If we simply increase the embedding strength of the watermark to prevent the watermark from becoming invalid, but if each picture is embedded with the same multi-bit watermark, then when the watermark reaches a certain length, the single-frame image will have obvious stripes, which will seriously affect the viewing quality. If the embedding strength is so small that it does not affect the quality of a single frame, then the watermarking method for digital conversion attacks cannot resist H.264 compression based on DCT

Images