cpp

Weibo.cn

CAPTCHA from http://login.weibo.cn/login/

The Captcha Image

Status

finshied.

Enviorment

Programing Language: C++
Library: opencv2 + libboost

Technique

use some computer vision algorithm to clean the peper noise and noise line, vertical projection to split the word, and CNN to train the dataset.

Steps

1.Download some captchas.

now is unavailable, see the backup at captchas_backup.zip.

2.Split the letters from every captcha.

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

3. Recognize the letters by human.

You can check the results in ./trainer/training_set.zip

cd ./trainer/
unzip training_set.zip

4. Train the dataset.

cmake . && make
./trainer
mv ./weibo.cn-nn-weights ../recognizer/

5. Test the recognizer

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

About the Accuracy

The accuracy is about 60%.