4.0 with LSTM

4.0 +

Tesseract 4.0 + source code is available in the 'master' branch of the repository. It adds a new OCR engine based on LSTM neural networks. It initially works (well) on x86/Linux. Model data for 101 languages is available in tessdata, tessdata_best, tessdata_fast repositories.

Documentation

• NeuralNetsInTesseract4.00

• VGSLSpecs

• VGSLSpecs info from Tensorflow

• DAS 2016 tutorial slides
  Slides #2, #6, #7 have information about LSTM integration in Tesseract 4.0.

• 4.0 Accuracy and Performance

Training Tesseract LSTM engine

• TrainingTesseract 4.00

• tess4training - LSTM Training Tutorial for Tesseract 4

• tessttrain - formerly ocrd-train

4.x ppa

Ubuntu PPAs for Tesseract 4.x & Leptonica 1.7x:

• https://launchpad.net/~alex-p/+archive/ubuntu/tesseract-ocr

Leptonica 1.74.1 package for Debian:

• https://packages.debian.org/sid/libleptonica-dev

4.0.0-alpha for Windows

Unofficial experimental binaries of tesseract-ocr 4.0.0-alpha are available from the following links. Each one is from a different commit from master branch in early 2017. See individual sites for more details:

• Windows Installer made with MinGW-w64 from UB Mannheim
• zip file with cppan generated .dll and .exe files, You have to install VC2015 x86 redist from microsoft.com in order to run them.
• Win64 build of tesseract 4.0.0 alpha, leptonica 1.74.1, and charlesw/tesseract .Net wrapper - built using CPPAN for Visual Studio 2017.

4.0.0-alpha with GUI frontend

VietOCR

Windows binaries of tesseract-ocr 4.0.0-alpha with GUI interface are available for VietOCR from

• VietOCR5.0alpha

• Visual C++ Redistributable for Visual Studio 2015 runtime - vc_redist.x86.exe is REQUIRED for VietOCR to run correctly.

VietOCR can be used to download appropriate 4.0.0alpha traineddata for additional languages.

gImageReader

Windows binaries of tesseract-ocr 4.0.0-alpha with GUI interface are available for gImageReader from

• gImageReader_3.2.1_qt5_i686_tesseract4.0.0.git2f10be5.exe
• gImageReader_3.2.1_qt5_x86_64_tesseract4.0.0.git2f10be5.exe

Download 4.0.0alpha traineddata to use with the above from master branch of tessdata. e.g. for Hindi download the following file:

https://github.com/tesseract-ocr/tessdata/blob/master/hin.traineddata *

3.05-dev

The [3.05 branch on GitHub] (https://github.com/tesseract-ocr/tesseract/tree/3.05) can be used by those who want the bug fixes for 3.05.01 release.

An unofficial installer for Tesseract 3.05-dev for Windows is available from Tesseract at UB Mannheim. This includes the training tools.

Current official release

The current official release is 3.05.01.