Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Image watermark method based on finite ridgelet transform

A ridgelet transform and image watermarking technology, applied in the field of information security

Inactive Publication Date: 2006-12-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wavelet analysis of linear singularities is not a good representation tool

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Image watermark method based on finite ridgelet transform
  • Image watermark method based on finite ridgelet transform
  • Image watermark method based on finite ridgelet transform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0071] Image processing performed

[0072] To sum up, the watermarking algorithm provided by the present invention makes full use of the characteristics of the finite ridgelet transform, the method is novel, and it has good robustness and has certain practical value.

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

No PUM Login to View More

Abstract

The invention relates to an image watermark method based on limited ridge wave transformation, wherein said method comprises: dividing the image into p blocks, and generating one watermark sequence w={wi|wi<;{-1,1}, 0<=i<=L-1}, at the length as L=p-1; processing limited ridge transformation on each block; searching for the direction with maximum energy in the ridge field, embedding watermark into said direction; the formula, when embedding watermark, is relative to the eye sensitivity with the different direction changes, while the embedded strength of watermark at different directions are different; embedding same watermark into each image block, top realize localization on watermark. The invention has high separate degree, and robustness on general image processing, while it can resist image shear impact.

Description

technical field [0001] An image watermarking method based on finite ridgelet transform belongs to the technical field of information security, and in particular relates to finite ridgelet transform theory and image digital watermarking technology. Background technique [0002] The rapid development of digital technology and network technology has changed people's life in many ways. The exchange of multimedia information based on computer and network provides a convenient way for the use and dissemination of digital works, which makes digital works have great advantages compared with traditional works. However, the advent of the network information age also poses new challenges to copyright protection, and the traditional information encryption technology can no longer meet the needs of practical applications. Digital watermarking technology is an emerging interdisciplinary application technology, which absorbs ideas and theories from many disciplines. Simply put, digital w...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
Inventor 马争张金沙
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com