https://github.com/zxdong262/tf-captcha-reader

Read captcha image with TensorFlow
https://github.com/zxdong262/tf-captcha-reader

captcha demo image tensorflow

Last synced: about 1 year ago
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Read captcha image with TensorFlow

• Host: GitHub
• URL: https://github.com/zxdong262/tf-captcha-reader
• Owner: zxdong262
• License: mit
• Created: 2018-07-23T05:55:58.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2018-11-19T09:12:23.000Z (over 7 years ago)
• Last Synced: 2025-02-25T02:07:11.532Z (over 1 year ago)
• Topics: captcha, demo, image, tensorflow
• Language: Python
• Homepage:
• Size: 20.5 KB
• Stars: 7
• Watchers: 3
• Forks: 5
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          

# tf-captcha-reader

Read captcha image with TensorFlow. [Tutorial](https://html5beta.com/page/tutorial-reading-captcha-with-tensorflow.html)

## Work flow

Image generated:(4 or 5 random en char or digit, multi-color, random roate 0 ~ 4 degree)

![example-captcha.png](example-images/example-captcha.png)

Make it binary:

![example-binary.png](example-images/example-binary.png)

Get shapes with opencv.findContours:

![example-findContours.png](example-images/example-findContours.png)

Split it:

![example-split-0.png](example-images/example-split-0.png)

![example-split-1.png](example-images/example-split-1.png)

![example-split-2.png](example-images/example-split-2.png)

![example-split-3.png](example-images/example-split-3.png)

Then feed to tensorflow.keras

Result:

```bash

# (trainData, trainLabels) = createData(8000)

# (testData, testLabels) = createData(2000)

Epoch 25/25

36029/36029 [==============================] - 2s 54us/step - loss: 0.0752 - acc: 0.9669

8970/8970 [==============================] - 0s 29us/step

evaluate test data set:

test_loss: 0.28423821404674937

test_acc: 0.9385730211817168

predict example-image(example-images/example-captcha.png):

['l', '8', 'V', 'T']

```

It can be improved by add more train data or add more epochs.

## Run

```bash

# install Helper libraries, for ubuntu 16.04 only

sudo apt-get install python3-pip python3-tk

pip3 install tensorflow numpy Pillow scipy opencv-python --user

# clone the repo

git clone git@github.com:zxdong262/tf-captcha-reader.git

cd tf-captcha-reader

npm i

python3 main.py

```