Digital Character CAPTCHA Recognition Using Convolution Network
Yu Cao
Abstract
Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA) is a type of automatic program to determine whether the user is human or not. The most common type of CAPTCHA is a kind of message interpretation by twisting the letters and adding slight noises in the background, plays a role of verification code. In this paper, we will introduce the basis of Convolutional Neural Network first. Then based on the handwritten digit recognition using CNN, we will develop a network for CAPTCHA image recognition.
Topics & Concepts
CAPTCHATuring testComputer scienceCharacter recognitionConvolutional neural networkOptical character recognitionCharacter (mathematics)Artificial intelligenceConvolution (computer science)Code (set theory)Interpretation (philosophy)Pattern recognition (psychology)Natural language processingArtificial neural networkSpeech recognitionImage (mathematics)Programming languageGeometrySet (abstract data type)MathematicsHand Gesture Recognition SystemsHandwritten Text Recognition TechniquesFace and Expression Recognition