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CAPTCHA from http://download.csdn.net/

The Captcha image

Status

finished.

Enviorment

Programing Language: C++
Library: opencv2 + libboost

Technique

split the letter averagely, and use KNN to recognize every letter.

Steps

1.Download some captchas.

mkdir ./downloader/captchas/
python ./downloader/downloader.py

2.Split the letters from captchas.

cd ./spliter && cmake . && make
mkdir letters
./spliter

3.Recognize the letters by human, create the dataset.

You can check the result at ./recognizer/dataset

4.Test the recognizer.

cd ./recognizer && cmake . && make
./recognizer test1.png
./recognizer test2.png
./recognizer test3.png
./recognizer test4.png