基于特征向量的敏感图像识别技术

针对现有色情敏感图像识别技术的缺陷,提出了基于特征向量的敏感图像识别技术.用YIQ彩色坐标系的色度和YUV彩色坐标系的色调作为皮肤的肤色模型,以5×5象素窗口的SSD（sum of square difference）作为皮肤的纹理模型.从敏感图像的皮肤掩码图像中提取与肤色区域数量和比例等有关的6个特征.将提取的特征向量输入到SVM（support vector machine）分类机,根据输出结果判断是否为敏感图像.对含457张敏感图像和1 101张非敏感图像的实验表明,该算法分类的精确度平均达到89.3%,查全率达到85.8%,误检率为4.4%.     

容灾备份及其等级和技术研究

随着计算机网络技术的普遍应用,使得信息量快速膨胀.对信息处理系统的高可用性和高安全性的需求,极大地刺激了容灾备份技术的应用和发展.容灾备份系统能够在灾难中最大限度地保障计算机信息系统提供正常的服务.要建立一个容灾备份系统,首先要了解容灾备份的等级要求,其次要了解其具体实现技术.本文将对容灾备份的基本概念、容灾备份的等级要求和容灾备份系统采用的技术作一介绍.     

A New Fragile Watermark for Image

Fragile watermarking is a method to verify the integrity and authenticity of multimedia data. A new fragile watermark for image was proposed, which can be used in image verification applications. The paper first described the above two techniques, some of which will be used in the method. Then it described the embedding and authentication process and also analyzed the method to show how it can survive some attacks. The experimental results show that the proposed method doesn‘t need the watermark or original image on authentication side. It provides more security against attack, and can localize where the temoerinlz has occurred.     

QuickBird影像在城市规划监察中的应用

根据高分辨率卫星影像的特点,探讨了利用不同时态的QuickBird数据,采用变化检测的方法,快速提取城市建设不一致信息,在规划审批资料的支持下,实现城市规划建设动态监察的技术和方法。通过对城市规划建设进行动态监察和定量化处理,为城市规划建设管理部门提供精确的城市发展状况分析,及时发现城市违法建设情况,从而提高城市规划建设管理部门查处违法建设行为的力度,实现城市管理的"数字执法"。     

IMAGE ANALYSIS BASED ON EDGE DETECTION TECHNIQUES

IntroductionEdges are pixels where brightness changesabruptly and often used in image analysis for find-ing region boundaries.It locates sharp changes inthe intensity function.Edges detection is basic im-age features.They carry useful information aboutobject boundaries.Edges can be used for object i-dentification,image analysis and image filteringapplications as well.We shall consider as an edgethe border between two homogeneous image re-gions having different illumination.This definitionimp…     

FULLY AUTOMATIC FRAMEWORK FOR SEGMENTATION OF BRAIN MRI IMAGE

Automaticbraintissuesegmentationfrommag neticresonanceimages(MRI)isofgreatimportance forresearchandclinicalstudyofmuchneurological pathology.Duringthepastdecade,theMRIhashad agreatimpactonthediagnosticimagingofmosthu manorgansystem.Thesegmentationofbrai…     

畸变汽车牌照图像的空间校正

首先针对我国汽车版照的常规模式，提出了用Hough变换提取牌照边框参数的方法，进而求得汽车牌照四边形区域4个顶点的坐标，并且给出了利用对极坐标参数表示的直线进行Hough变换的具体途径。然后，根据畸变牌照的4个顶点和归一化汽车牌照图像的4个顶点之间的一一对应关系，求解双线性空间变换方程，进而对畸变图像进行校正。最后给出了一种图像毛刺的剔除方法。实验表明，本文介绍了的方法对畸变牌照图像的归一化可以取得良好的效果。     

沥青混合料图像多阈值分割方法

将基于遗传策略的多阈值分割法应用到沥青混合料图像分割中,解决了边缘检测法、单阈值法抗干扰性差、分割结果不能直接用于级配分析的难题。实验结果表明,该方法的分割精度优于边缘检测类和单阈值法,而且可将沥青混合料中的粗骨料、细骨料、纹理和空隙等组成部分分离出来,为后续的级配分析计算奠定基础,具有广阔的应用前景。     

二值图像形态操作与结构元素分析

分析了二值图像的形态操作,探讨了二值图像形态操作中结构元素对图像处理结果的影响.在Matlab数字图像处理工具箱中,将索引图像转换成二值图像,给出了运用钻石形结构元素对二值图像进行了膨胀和腐蚀操作的实例.     

Synthetically Evaluation System for Multi-source Image Fusion and Experimental Analysis

Introduction The image fusion technology produces a singleimage from a set of input images. The fused imageshould have more complete information which ismore useful for human or machine perception.With the merits of high degree of system explo-ration, automation, availability, reliability, capa-bility and low cost, it boasts broad application per-spective in many fields such as computer vision,automatic object detection, image processing, par-allel and distributed processing, robotics and re-m…