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

High capacity reversible water mark method based on predication and companding technology

A high-capacity, watermarking technology, applied in image data processing, instrumentation, image data processing, etc., to achieve the effects of low computational complexity, improved embedding capacity, and low embedding distortion

Inactive Publication Date: 2010-09-29
BEIJING JIAOTONG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the case of low threshold, this method also has the same disadvantages as Tian's method

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
  • High capacity reversible water mark method based on predication and companding technology
  • High capacity reversible water mark method based on predication and companding technology
  • High capacity reversible water mark method based on predication and companding technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] For an original image I of r×c, all pixels are arranged into a one-dimensional sequence s in raster order 1 ,s 2 ,...,s r×c , where s i Indicates the pixel value at position i, 1≤i≤r×c.

[0024] Such as figure 2 As shown, the embedding process of the present invention includes the following parts:

[0025] 1. Forecast operation:

[0026] s ~ i = s i + 1 - - - ( 1 )

[0027] where s i Indicates the current pixel value, represents its predicted value. For each sorted pixel, the prediction operation essentially uses its right-neighboring pixels to predict itself.

[0028] Since forecasts are biased, a forecast error oc...

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 discloses a high-capacity reversible watermark method based on predication and companding technique. Through the introduction of the companding technique, the invention includes two processes: watermark embedding and watermark extracting. The invention effectively solves the problem of capacity consumption of position drawing in reversible watermark algorithm, and achieves high embedding capacity even in the situation of low threshold value. Meanwhile, due to the operation of data re-embedding after the compression of high predication errors, the invention still can maintain high peak signal to noise ratio (PSNR value).

Description

technical field [0001] The invention relates to a high-capacity reversible watermarking method based on prediction and companding technology, especially the high-capacity reversible watermark, belonging to the technical field of digital watermarking. Background technique [0002] Digital watermarking technology refers to a technology that embeds some logos or signatures in digital multimedia without being noticed. It plays a vital role in some applications, such as digital media copyright protection, authentication, data integrity, digital fingerprinting, and data hiding. However, digital watermarking usually introduces some subtle, irreversible or some permanent distortions to the carrier image. Although these distortions are very slight, in some fields that require high precision, such as law, medicine and military systems, when After the hidden data has been extracted, the original image needs to be restored without distortion, so even very slight distortions are not all...

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 Patents(China)
IPC IPC(8): G06T1/00
Inventor 赵耀翁韶伟潘正祥倪蓉蓉
Owner BEIJING JIAOTONG UNIV
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