摘 要

在网络和多媒体技术越来越发达的今天，信息检索技术成了现在计算机领域的重要内容，而图像检索技术又正是这其中的重要内容之一。而网络资源的极大丰富以及图像检索技术不断发展成熟，使得图像检索技术的应用领域不断扩大，这为图像检索技术的继续研究提供条件。
人们为了对图像进行更好的使用和组织管理，便开发出了多种多样图像检索技术，本文首先要将各种图像检索技术的工作原理、研究现状、相关图像搜索引擎与发展趋势作一个介绍。
随着网络传送速度与计算机信息处理速度的提高，网页中对多媒体信息的使用变得十分普及，特别是图像信息，己经成为表示网页内容不可缺少的组成部分。在实现对网页中文本信息提取的同时，如何再为用户抽取所需的图片资料，是信息检索中一个重要的方面。于是各种基于Web的图像检索系统应运而生。它们采用不同的工作方式，极大地方便了用户对网上图像进行检索。
目前图像检索技术的发展正走向更加成熟和完善，其中Web图像搜索技术也更加完善，本文将介绍这种图像检索技术并阐述Web页中的图像与文本之间的关系，对相似度作出了详细的论述。

关键字: 搜索引擎 图象检索 文本处理 信息检索 相似度 相关性反馈

Study of Web Images Retrieval Technique
Abstract
Today, the network and multimedia technology are more and more developed, retrieval technique of information has become the important content of the computer field now, and picture retrieval technique is exactly one of the important contents among them. And network resources are enriched greatly and picture retrieval technique is developing ripe constantly, make picture application of retrieval technique expand constantly, this offer terms for picture continuation research of retrieval technique.

People develop varied picture retrieval technique in order to carry on better use and organizational management to the picture , this text should first act as an introduction various kinds of picture operation principle , research current situation , relevant picture search engine and development trend of retrieval technique.

With the improvement of the transfer rate of the network and information processing speeds of the computer, it is popularized very much that the webpage hits the use for information of the multimedia, especially the information of the picture , it shows the component with indispensable content of the webpage that own but become. While realizing drawing the Chinese version information of the webpage, how to collect the necessary picture materials for users again, it is an important respect in information retrieval. Then various kinds of picture retrieval systems based on Web arise at the historic moment. They adopt different working way, help user search to the picture online greatly.

The development of retrieval technique of the picture is moving towards riper and more perfect at present, Web picture too perfect to search for technology among them, this text recommend the picture retrieval technique and explain Web picture and relation of text of page, make detailed argumentation to similar degree ,etc. , search for through experiment model conclusion indicate the high efficiency that the picture searches for.

Keywords: Search engine Image Retrieval Text-processing Information retrieval Similar degree Dependence feedback

目 录
摘 要 i
ABSTRACT ii
第一章 前言 1
1.1 引言 1
1.2 现有的图象检索技术 1
1.2.1 搜索引擎的工作原理 1
1.2.2 图像搜索引擎的检索途径 2
1.2.3 对几个基本引擎的分析 2
1.2.4 搜索引擎的基本要点 3
1.3 图像检索的发展方向 4
第二章 基于Web的图像搜索 6
2.1 文本与图像之间的关系 6
2.1.1 表示图像内容的文本标记 6
2.1.2 文本的权值比较 6
2.2 图像信息检索 7
2.2.1 检索模型与相似度 7
2.2.2　 分词技术和匹配方法 8
2.3 检索反馈 .9
结束语 11
参考文献 11