一种SVM验证码识别算法  

Verified code recognition algorithm based on SVM

作　　者：殷光[1] 陶亮[1] 

机构地区：[1]安徽大学计算智能与信号处理教育部重点实验室,合肥230039

出　　处：《计算机工程与应用》2011年第18期188-190,194,共4页Computer Engineering and Applications

基　　金：国家自然科学基金(No.60572128);安徽省人才发展基金(No.2005Z029)~~

摘　　要：设计验证码的主要目的是区分人类和计算机,用来防止网络机器人的一些恶意行为。验证码的出现也催生了一批新工种,电子商务的发展迫切需要一种推广方式来推销他们的商品,残障人士上网问题也需要迫切关注,因此许多人开始研究网络机器人技术,用来实现邮箱自动注册、群发信息、自动灌水、自动登录等功能。目前,各种类型网站系统都利用验证码阻止网络机器人入侵,从而验证码识别技术成为研究热点。基于SVM技术对图像验证码进行识别,取得了良好的效果。The usage of verified code is to distinguish between human and machine behavior,which can be used to prevent the malicious behaviors of web robot.The emergence of verified code also makes a number of new types of jobs.The development of e-commerce needs a certain way to promote its goods,and disabilities need urgent attention;thus,many people begin to study web robot technology.They hope that it can realize automatic registrations for email systems,multi-send messages,au- tomatic flood-blogging and auto-login et al.At present,various types of web systems make use of verified code to prevent robots invasion,so the verified code recognition technology is a research hotspot.Based on SVM（Support Vector Machine）,a verified code recognition algorithm is proposed,and the experimental results show that the algorithm is efficient.

关 键 词：支持向量机 序贯最小化算法 选择工作集 核函数 多类分类 验证码识别 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]