Depth information-based image watermarking method

Abstract

The invention discloses a depth information-based image watermarking method, belonging to the field of image information safety. The method comprises the following steps: A) obtaining distribution conditions of depth information of a host image; B) according to the distribution conditions of the depth information of the host image, determining areas to be embedded with watermarks and the quantity of the embedded watermarks in each area, wherein the greater the depth value of the area is, the greater the quantity of the embedded watermarks is; C) according to the area to be embedded with the watermarks and the quantity of the embedded watermarks in each area in the step B), embedding and extracting the watermarks. According to the method disclosed by the invention, the areas to be embedded with the watermarks and the quantity of the embedded watermarks in each area are determined according to the depth information of the host image, and the greater the depth value of the area is, the greater the quantity of the embedded watermarks is; accordingly the vision effect of the image with the embedded watermarks is ensured, moreover, under the condition of attacks by proper noise, cutting, JPEG and the like, better robustness is realized, and a new idea is provided for digital image watermarking technology.

Description

technical field [0001] The invention discloses an image watermarking method, in particular relates to an image watermarking method based on depth information, and belongs to the field of image information security. Background technique [0002] In the past few years, with the rapid development and wide application of digital technology and the Internet, the copyright protection problems of various digital information have become increasingly serious. As a new technology, digital watermarking plays an important role in copyright protection, piracy tracking, copy protection, product authentication and so on. [0003] According to the embedding position of the watermark, digital watermarking can be divided into two methods: space domain and transform domain (see [Pitas, I, "A method for signature casting on digital images," IEEE International Conferenee on Image Processing, vol.3, pp. 215-218, Sep 1996.]). Among them, the spatial watermark processing is to directly embed wate...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is: the robustness is not high, the amount of information is small, that is, the amount of watermark information that can be embedded cannot be too much, otherwise it can be seen visually

This method is another effective application of the depth image, and it is also a new idea of ​​the watermark algorithm. No relevant reports or records have been found so far.

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