captcha recognition / OCR
A TensorFlow-based training framework for captcha and image-text recognition using CNN/ResNet/DenseNet with RNN/CTC.
Same problem, same approach. Swapping one for another is a config change, not a rewrite.
When you want a simpler independent CNN+CTC TensorFlow OCR trainer instead of the seed's project-management framework; note GPL-3.0 license.
Tensorflow-based CNN+LSTM trained with CTC-loss for OCR
When you need a minimal CTC+TensorFlow OCR implementation and don't require the seed's config-heavy pipeline.
Use CTC + tensorflow to OCR
When you want a TensorFlow captcha recognizer supporting Chinese characters and prefer a straightforward example over the seed's full framework.
基于深度学习和TensorFlow的英文和汉字验证码识别
When you want an MIT-licensed TensorFlow CNN+CTC OCR baseline without the seed's multi-project management layer.
CNN+LSTM+CTC based OCR implemented using tensorflow.
When you want a widely used Jupyter notebook to train captcha recognition models and need a quicker starting point than the seed's full project configuration.
验证码识别
Solves the same problem with a different architecture or at a different layer. Expect to rewrite the integration.
When you prefer PyTorch and focus on scene text recognition rather than captcha specifically.
text_recognition_toolbox: The reimplementation of a series of classical scene text recognition papers with Pytorch in a uniform way.
When you want a PyTorch-based OCR training framework with MIT license instead of TensorFlow.
Simple Pytorch framework to train OCRs. Supports CRNNs, Attention, CTC and Cross Entropy Loss.
An earlier or more limited way to do the job. Still the right call when you need something small, proven, or CPU-only.
When you specifically need license-plate recognition with a lightweight CNN+CTC network rather than general captcha training.
Tensorflow based. Use CNN and CTC loss. It is a light network for Plate Recognition
These projects were analysed and named captcha_trainer among their alternatives. The relationship is not symmetric — how captcha_trainer rates them is a separate judgement, made when captcha_trainer is analysed in its own right.
calls captcha_trainer “captcha-specific OCR model training pipeline; choose if your task is captcha character recognition and you can train your own model.”
Tesseract Open Source OCR Engine (main repository)