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Digital image recognising method based on characteristics

A technology of digital images and authentication methods, applied in character and pattern recognition, instruments, computer parts, etc., can solve the problems of positioning accuracy and robustness to be improved, and achieve good invisibility, good robustness, and positioning. high precision effect

Inactive Publication Date: 2007-05-09
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the watermarking methods for image authentication using watermarking technology have nothing to do with the image, and the positioning accuracy and robustness need to be improved.

Method used

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  • Digital image recognising method based on characteristics
  • Digital image recognising method based on characteristics
  • Digital image recognising method based on characteristics

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Embodiment Construction

[0034]With the rapid development of computer and network technology, the exchange of multimedia information has reached an unprecedented depth and breadth. However, multimedia information is subject to various unintentional or intentional tampering attacks during transmission, which makes people question the integrity of digital media (digital images, digital audio, digital video) and the authenticity of content. If the tampering involves important content such as national security, court evidence, historical documents, etc., it may cause adverse social impact or major political and economic losses. Therefore, how to effectively protect the authenticity and integrity of digital media content in the network environment has become a serious practical problem. Traditional encryption technology based on cryptography has been maturely applied to the protection of digital media content in encrypted state. However, with the development of computer software and hardware technology, t...

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Abstract

This invention is a digital image attestation method based on half-perished water attestation. This invention puts the original image with half-perished water character as water mark, and embeds it into the image by structured method. When the image needs the attestation, picks up the water mark through judgment, that is, the error between of the character of the original image and the character of the attesting image is in the receivable range, in order to attest the image whether reliable. This invention can judge whether the process of the image is sophisticating or formally processing, and can precisely locate the position of the sophistication and belongs to the field of multi-media signal processing. This invention provides a new method to the digital image attestation.

Description

technical field [0001] The invention is an image authentication method based on a semi-fragile watermark, capable of correctly judging whether image processing is malicious tampering or normal image processing, and accurately locating the tampered position, belonging to the field of multimedia signal processing. Background technique [0002] With the digitization of the stored form of most multimedia, the media information can be easily modified and reproduced through the use of editing software. In some occasions, multimedia data must be proven to be credible, that is, it has not been maliciously tampered with. There are some deficiencies in the application of traditional information integrity protection technology based on digital signature to multimedia information. For example, it is too sensitive to normal signal processing (such as data compression, signal filtering, etc.) and channel noise (such as wireless channels, etc.), and cannot locate the location of tampering...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
Inventor 刘红梅黄继武
Owner SUN YAT SEN UNIV
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