记个地址
Open-Source Chinese and Japanese Handwriting Recognition
http://code.google.com/p/tesseract-ocr/
The Tesseract OCR engine was one of the top 3 engines in the 1995 UNLV Accuracy test. Between 1995 and 2006 it had little work done on it, but it is probably one of the most accurate open source OCR engines available. The source code will read a binary, grey or color image and output text. A tiff reader is built in that will read uncompressed TIFF images, or libtiff can be added to read compressed images.
通用验证码识别(Captchio)对Captcha(验证码)识别的程序（事实上我们将以DLL的形式提供给使用顾客），通过该程序，你可以接近100%地识别随机的验证码。其核心是Captchio识别库，通用的验证码识别引擎。
http://caca.zoy.org/wiki/PWNtcha
I created PWNtcha in 2004 as a personal research project, but only published my results, not the program itself. Given the number of captcha-breaking software available for sale now, I changed my mind and decided to publish the PWNtcha source code. It can be downloaded from Subversion:
svn co svn://svn.zoy.org/caca/pwntcha/trunk pwntcha
