captcha

Efficient CAPTCHA Recognition Technology and CAPTCHA Classification Idea

高效的验证码识别技术与验证码分类思想

While you are thinking about that checkout experience , can you also do something about that Captcha ?

当你在考虑结账的用户体验时，你能做一些关于验证码的吗？

Figure 3 is an example of a CAPTCHA image .

图3是CAPTCHA图像的一个例子。

Of course , but picking the right CAPTCHA device is an implementation detail .

当然，选择正确的CAPTCHA设备是一个实现细节。

The most popular such method is CAPTCHA .

最常见的一种方法是CAPTCHA。

Are some CAPTCHA devices better than others ?

是否有些CAPTCHA设备比其他设备更好？

I want users to have to fill in a captcha to comment .

我希望用户必须要回答captcha才能写注释。

Despite these difficulties , CAPTCHA has become one of the most popular spam prevention devices .

如果忽略这些困难不谈，CAPTCHA已经成为了时下最流行的垃圾信息防治工具之一。

In the process of designing the presentation layer , the technique of captcha and data encryption is introduced to strengthen system safety .

在表示层的设计过程中，为增强系统的安全性，本文研究了图形验证码技术和数据加密技术。

Mr. Bhat realized he could break the Captcha .

哈特先生意识到，他可以攻破验证码。

Captcha component completes the verification code switch by using Servlet directly , without affecting other components in the page .

Captcha组件直接利用Servlet来完成验证码的即时切换，而不影响页面中其他组件。

Spammers use optical character recognition to defeat CAPTCHA , so there is usually significant distortion to the images .

垃圾信息散布者常常会使用视觉字符识别来破解CAPTCHA，所以通常我们需要严重歪曲这些图像。

A CAPTCHA is a program that can generate and grade tests that humans can pass but current computer programs cannot .

一个CAPTCHA程序能够生成一些人类能通过，但是目前的计算机却无法通过的测试。

Lead-in Captcha Authentication code mechanisms , and it prevents the computer programs from logging on automatically effectively .

并将Captcha验证码技术引入到单点登录中，有效的防止计算机程序自动登录。

Try advancing the captcha arms race through measured keystroke press and release times for your web authentication applications .

通过在Web身份验证应用程序中测量击键按下和释放时间，进一步推动captcha竞赛。

But if a computer can 't read such a CAPTCHA , how does the system know the correct answer to the puzzle ?

不过，既然计算机无法阅读此类CAPTCHA，系统又如何知道这个问题的正确答案呢？

Although there are various kinds of CAPTCHAs , only the text-based CAPTCHA is widely used in commercial websites .

虽然验证码种类繁多，但只有基于文本模式的验证码被广泛地使用于商业站点。

Shape Context is a shape description method . This paper proposed a improved shape context , using for recognizing the adhered and complicated CAPTCHA .

形状上下文（Shapecontext）是一种形状描述方法，本文给出了一种改进的形状上下文方法用于字符粘连的复杂验证码识别。

More specifically , each word that cannot be read correctly by OCR is placed on an image and used as a CAPTCHA .

具体地说，就是将OCR无法正确识别的单词以图片的方式显示并作为CAPTCHA来使用。

As the importance of network increases in life , network security is gaining attention from all sectors , CAPTCHA is one of the effective means to maintain network security .

随着网络在生活中的重要性与日俱增，网络安全逐渐引起各界的重视，验证码是维护网络安全的有效手段之一。

CAPTCHA is a kind of automated Turing test program , which is used to judge whether the end user is a human being or a computer program .

验证码是一种自动图灵测试程序，用来判断终端用户是人类还是计算机程序。

Our method can effectively recognize the distorted and merged CAPTCHA.3.We present a recognition method based on Markov Random Field for distorted and merged CAPTCHA .

该方法能有效地识别扭曲粘连字符验证码。3.提出了一种基于马尔科夫随机场的扭曲粘连字符验证码识别方法。

The captcha was generated by mechanism of extraction based on character lib and time-limit checking , it was difficult for cracking by hacker program .

图形验证码由基于字符库的抽取机制和过期验证机制两种机制生成，增加了黑客程序的破解难度。

To validate the captcha we need to save the random text written to the captcha image somewhere and then check it at the form submission time .

为了对验证码进行检验，我们需要将验证码中的文本保存起来，然后在提交的时候进行检查是否一致。

CAPTCHA as a Turing test , its purpose is to distinguish the user is a human or computer , CAPTCHA can effectively block attacks and maintain network security .

验证码作为一种图灵测试，目的在于区分用户是人类还是计算机，验证码可以有效地阻挡机器攻击，维护网络安全。

If you use CAPTCHA make sure the letters are readable : several sites use CAPTCHA filters as a method of reducing spam on comments or on registration forms .

有些网站将图片认证作为对抗垃圾评论的方法，或是在注册表单上使用。

The traditional method of extracting pixel points one by one and template matching , can only recognize simple CAPTCHA , while there is no efficient method to recognize the adhered and complicated CAPTCHA .

传统的逐个像素点特征提取和模板匹配的方法，只能对简单验证码进行识别，而字符粘连的复杂验证码还无有效的识别方法。

A CAPTCHA is a program that can generate and grade tests that most humans can pass , but current computer programs can 't pass ( typically a picture with distorted text ) .

CAPTCHA是可以生成并分级测试的程序，这些测试人可以通过但当前计算机程序却不可以（很典型地如一个有无序文本的相片）。

And some people , such as the visually impaired , cannot see CAPTCHA images at all , so this technique exhibits poor accessibility , and can even be illegal in some circumstances .

有些人，比如视觉障碍人士，根本就看不到CAPTCHA图像，所以这个技巧的适用性比较差，在某些情况下甚至是不合法的。

The toolkit contains various controls like : datagrids , charts , calendars , menus , trees , tabs , HTML , spell checkers , captcha , explorer bars , scheduling , and others .

该工具集包含了各种控件，如数据表格、图表、日历、菜单、树、标签、HTML、拼写检查器、验证码、浏览工具条、调度器等等。