Synthetic handwritten CAPTCHAs
نویسندگان
چکیده
Article history: Received 9 August 2008 Received in revised form 30 November 2008 Accepted 19 December 2008
منابع مشابه
Generation and Performance Evaluation of Synthetic Handwritten CAPTCHAs
In this paper we explore the potential of handwriting for use in CAPTCHAs. A synthetic handwriting generation method is presented, where the generated textlines need to be as close as possible to human handwriting without being writer-specific. The primary application of such a synthetic generator is in the design of handwritten CAPTCHAs (Completely Automatic Public Turing Test to Tell Computer...
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Online services which allow users to contribute content and interact remotely over the internet in some manner are common today. Many of these services, like spam control for blogs and email account sign-up, require that they be accessed only by humans and not machines (automated scripts or bots). One method of differentiating between humans and bots is by using a CAPTCHA (Completely Automated ...
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Online services are often protected with captchas that typically must be solved by typing on a keyboard. Now that smartphones and tablets are increasingly being used to browse the web, new captchas best suited to touch-capable devices should be devised, since entering text on soft keyboards is usually uncomfortable an error-prone. We contribute to solving this issue with μcaptcha, a novel captc...
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Generating synthetic images is an art which emulates the natural process of image generation in a closest possible manner. In this work, we exploit such a framework for data generation in handwritten domain. We render synthetic data using open source fonts and incorporate data augmentation schemes. As part of this work, we release 9M synthetic handwritten word image corpus which could be useful...
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CAPTCHAs are computer-generated tests that humans can pass but current computer systems cannot. CAPTCHAs provide a method for automatically distinguishing a human from a computer program, and therefore can protect Web services from abuse by so-called “bots.” Most CAPTCHAs consist of distorted images, usually text, for which a user must provide some description. Unfortunately, visual CAPTCHAs li...
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ورودعنوان ژورنال:
- Pattern Recognition
دوره 42 شماره
صفحات -
تاریخ انتشار 2009