go.tesseract is a wrapper for the tesseract-ocr library.
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##go.tesseract go.tesseract is a wrapper for the tesseract OCR library (text-recognition from image/pdf).

development disclaimer: go.tesseract is under development and package outline is subject to change.

Installation and dependencies

go.tesseract has two direct dependencies; go.leptonica and libtesseract

Make sure you have installed go.leptonica. go.leptonica has a C library dependency, please read the go.leptonica/README.md.

You are required to install the tesseract library including development headers at version 3.02.02 or later. You absolutely need 3.02.02 (or later) as go.tesseract can not compile with earlier versions of tesseract. At time of writing this version of tesseract is not in the ubuntu/debian stable repository yet.

Debian testing (jessie) package

sudo apt-get install -t testing libtesseract3 libtesseract-dev

OSX with Homebrew

Do the following before trying to go get this package:

$ brew install leptonica
$ brew install tesseract
$ export CGO_LDFLAGS="-L/usr/local/Cellar/leptonica/1.69_1/lib -L/usr/local/Cellar/tesseract/3.02.02/lib"
$ export CGO_CFLAGS="-I/usr/local/Cellar/leptonica/1.69_1/include -I/usr/local/Cellar/tesseract/3.02.02/include"

Note: this assumes you are using the standard Brew path of /usr/local/Cellar

Manual installation

Download, configure, make and install

svn checkout http://tesseract-ocr.googlecode.com/svn/tags/release-3.02.02 tesseract-ocr-read-only
cd tesseract-ocr-read-only
sudo make install
sudo ldconfig

Language files

If you have installed from debian testing (jessie):

sudo apt-get install -t testing tesseract-ocr-YOUR-LANGUAGE-SHORTCODE

# example, this installs dutch and english
sudo apt-get install -t testing tesseract-ocr-nld
sudo apt-get install -t testing tesseract-ocr-eng

If you have installed manually; copy language files (do this for any language you require)

sudo cp tessdata/YOUR-LANGUAGE-SHORTCODE.* /usr/local/share/tessdata/

# example for english and dutch:
sudo cp tessdata/eng.* /usr/local/share/tessdata/
sudo cp tessdata/nld.* /usr/local/share/tessdata/

For more information, view the tesseract compilation guide.