A method and device for reversible clear watermarking based on vector graphics compression

Abstract

The invention proposes a reversible clear watermarking method and device based on vector graphics compression. The present invention obtains a set of discrete graphic outline curve points by vectorizing the clear watermark image, and then saves it to the non-clear watermark image area in the host image after vector graphics compression, which is used to assist the embedding and removal of the clear watermark image , thereby reducing the dependence on the original clear watermark image in the process of reversible clear watermark processing, and then solving the problems of low compression efficiency of clear watermark images, large distortion of carrier image modification, and poor embedding effect of clear watermark images. The invention also realizes the translucent three-dimensional embossed bright watermark effect by using the method based on the convolution relief and double single-increase compound mapping, so that the fusion of the carrier image and the bright watermark image is more natural.

Description

technical field [0001] The present invention relates to the technical field of information hiding, in particular to the technical field of image reversible information hiding, and in particular to a reversible bright watermarking method and device based on vector graphics compression. Background technique [0002] Information hiding has attracted more and more attention because of its good performance in intellectual property protection and authenticity identification of digital media, covert data communication in open network environment and so on. The so-called information hiding refers to a technology that utilizes the redundancy of the digital carrier to embedding watermark information to obtain a secret carrier by modifying the carrier data appropriately. But the information embedding process of the traditional information hiding algorithm will bring permanent distortion to the original carrier, and these distortions are unacceptable for some applications. In order to ...

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly aims at the dependence of the original clear watermark image on the removal of the clear watermark image and the distortion-free restoration process of the original host image carrier in the current reversible clear watermark algorithm, and proposes to use the traditional reversible concealment algorithm to embed the compressed clear watermark image data into the non-obvious Watermark area, used to assist the process of reversible clear watermarking

Images