Robust reversible watermark embedding and extracting method based on feature region geometry optimization
A feature area and watermark embedding technology, applied in image data processing, instruments, image data processing, etc., can solve problems such as lack of robustness
Active Publication Date: 2014-07-16
西安电子科技大学昆山创新研究院 +1
View PDF5 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although this type of method improves the robustness of watermarking against JPEG compression and additive Gaussian noise compared with the previous two types of methods, its robustness against complex attacks is lacking, and its capacity, imperceptibility and robustness The comprehensive performance of the three aspects needs to be further improved
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0108] In order to enhance the robustness of the current digital image watermarking technology against complex attacks and improve the comprehensive performance of the robust reversible watermarking method in terms of capacity, imperceptibility and robustness, this embodiment provides a feature-based A geometrically optimized robust reversible watermark embedding method, the implementation steps are as follows:
[0109] Step 1: Perform three-level lifting wavelet transform on the original image I to obtain its low-frequency subband R under the third-level wavelet decomposition scale 3,a :
[0110] The original image I with a size of M×N is subjected to a three-level lifting wavelet transform, and a set of wavelet decomposition subband sequences R={R t,a , R t,h , R t,v , R t,d}, where the integer t is the decomposition scale, 1≤t≤3, R t,a is the low-frequency subband under the t-th level wavelet decomposition scale, R t,h is the horizontal subband under the t-th wavelet ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a robust reversible watermark embedding and extracting method based on feature region geometry optimization. Due to the fact that the watermark embedding method includes the steps of obtaining a low-frequency sub-band of an original image, obtaining an initial feature point set, obtaining a candidate feature point set, obtaining a candidate feature region set, calculating a candidate feature region incidence matrix, calculating a candidate incidence weight vector, obtaining a screen feature region set, obtaining a round feature region set, obtaining a feature image, obtaining a secret key image and obtaining secret key information, the defects of an existing robust reversible watermark method are overcome, the vision quality of an image with a watermark is improved, the watermark embedding capacity is improved, the robust of resisting complicated attacks of the watermark is enhanced, the safety of the watermark is improved, and the comprehensive performance of the robust reversible image watermark method is improved.
Description
technical field [0001] The invention belongs to the field of multimedia information security, and relates to a robust and reversible watermark embedding and extraction method based on geometric optimization of feature regions, which can be used for content authentication and copyright protection of digital images in a network environment. Background technique [0002] As one of the supporting achievements of national infrastructure construction, digital image occupies a very important position and is widely used in national economy and national defense construction. With the development and popularization of computer technology and digital imaging equipment, the security protection of digital images has become one of the important problems to be solved in the field of multimedia information security. In recent years, digital watermarking technology provides an effective way to solve this problem by embedding the watermark in the host image. However, the traditional method of...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
Inventor 安玲玲尹广学吴卿高新波万波王泉
Owner 西安电子科技大学昆山创新研究院