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Fork of Tesseract Tools for Android.
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A fork of Tesseract Tools for Android (tesseract-android-tools) that adds some additional functions. Tesseract Tools for Android is a set of Android APIs and build files for the Tesseract OCR and Leptonica image processing libraries.

This project works with Tesseract pre-release v3.04 and Leptonica v1.71. The required source code for Tesseract and Leptonica is included within the tess-two/jni folder.

The tess-two subdirectory contains tools for compiling the Tesseract and Leptonica libraries for use on the Android platform. It contains an Android library project that provides a Java API for accessing natively-compiled Tesseract and Leptonica APIs.


  • Android 2.2 or higher
  • A v3.02 trained data file for a language. Data files must be extracted to a subdirectory named tessdata.


The eyes-two subdirectory contains a second, separate library project with additional image processing code copied from the eyes-free project without modifications. It includes native functions for text detection, blurriness detection, optical flow detection, and thresholding. Building eyes-two is not necessary for using the Tesseract or Leptonica APIs.

While I haven't tested all the Eyes-two code, I've bundled it in this project alongside tess-two for convenience due to its dependency on Leptonica.


This project is set up to build on Android SDK Tools r22.3+ and Android NDK r10+. The build works on Linux, Mac OS X, and Windows 7/8. See Issues for reported build issues.

On 64-bit Ubuntu, you may need to install the ia32-libs 32-bit compatibility library.

To build tess-two, run the following commands in the terminal:

git clone git:// tess
cd tess
cd tess-two
android update project --path .
ant release

To build eyes-two, additionally run the following:

cd ..
cd eyes-two
android update project --path .
ant release

After building, the tess-two and eyes-two projects can be imported into Eclipse using File->Import->Existing Projects into Workspace.


While this project does not require Maven (and this project has not yet been registered in a Maven central repository), it can be integrated into a local Maven repository for convenience.


This project is licensed under the Apache License, Version 2.0.

 * Copyright 2011 Robert Theis
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
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