Digital signature and watermarking are two main methods of image authentication.
数字图像鉴别的基本方法主要有数字签名和数字水印两种。
A novel algorithm for image authentication in ridgelet domain is presented.
提出了一种在脊波变换域上进行图像认证的新算法。
Digital image authentication includes active authentication and passive authentication.
数字图像认证技术包括主动与被动两种方法。
This paper presents a novel semi-fragile watermark algorithm for image authentication and recovery.
提出一种新的用于图像认证及恢复的半脆弱水印算法。
From the aspect of image understanding, we also present two classes of image content features for image authentication.
并从图像理解的角度出发，给出了两类图像内容特征提取方法。
The original watermark is divided into the robust watermark and the semi-fragile watermark for copyright protection and image authentication.
原始水印分为鲁棒水印和半脆弱水印，分别用于版权保护和图像认证。
Pointing out the limitation of the image authentication algorithm based on dividing blocks and give the reason why collage attack can be successful.
指出基于分块的图像认证方法存在的缺陷，以及共谋攻击得以成功的原因；
As a branch of multimedia information security technology, digital image authentication is paid close attention by one of a growing number of experts.
数字图像认证技术作为多媒体信息安全技术的分支之一，受到了越来越多专家学者的重视。
A new invisible watermarking technique which could localize tampered areas for image authentication was proposed, based on image feature and public key cryptography.
提出一种基于图像特征和公钥密码系统的易损水印算法，在图像认证中能够定位图像被篡改的位置。
It has brought us great convenience and a great number of information security problems as well. Such as information theft, copyright protection of multimedia data and image authentication.
它给人们带来种种便利的同时也带来了一系列的信息安全问题，比如信息窃取问题、多媒体信息的版权保护问题、信息篡改问题等。
Image authentication needs to contrast with the digest and watermark character to confirm whether the content is tampered.
验证图像时需同时通过与摘要的对比以及与水印特征的对比来确定内容是否被篡改。
One way of doing this is to use image-authentication systems to reveal if someone has tampered with a picture.
一种做法是运用图像鉴定系统来显示是否有人擅自改动了图片。
One way of doing this is to use image-authentication systems to reveal if someone has tampered with a picture.
一种做法是运用图像鉴定系统来显示是否有人擅自改动了图片。
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