Installing Leptonica, TESSERACT-OCR

Installing TESSERACT-OCR

Preparatory work:

Compilation environment: GCC gcc-c++ make (this environment is common machine, can be ignored)

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1	yum install gcc gcc-c++ make

Dependent packages: autoconf automake libtool libjpeg-devel libpng-devel libtiff-devel zlib-devel Leptonica (1.67 or more)

1. autoconf automake libtool libjpeg-devel libpng-devel libtiff-devel Zlib-devel can be installed via Yum:

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12	yum install autoconf automake libtoolyum install libjpeg-devel libpng-devel libtiff-devel zlib-devel

2. Leptonica requires source code compilation and installation

References:

http://paramountideas.com/tesseract-ocr-30-and-leptonica-installation-centos-55-and-opensuse-113

http://www.leptonica.org/source/README.html

Download Leptonica package: http://www.leptonica.org/source/leptonica-1.68.tar.gz

Switch to the leptonica-1.68 root directory after decompression

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123	./configuremakemake install

Tesseract Installation:

rely on installation to start installing Tesseract

Download tesseract-3.01 installation package: http://tesseract-ocr.googlecode.com/files/tesseract-3.01.tar.gz

Switch to the tesseract-3.01 root directory after decompression

(If you encounter an error similar to strngs.h:1: Error:stray ' \357 ' in the program when you make it, convert the Tesseract-3.01/ccutil/strngs.h file to ANSI encoding to save and re- New compilation)

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./autogen.sh./configuremakemake installldconfig

Tesseract English Language pack installation:

Download tesseract-3.01 English Language pack: http://tesseract-ocr.googlecode.com/files/tesseract-ocr-3.01.eng.tar.gz

after decompression, copy all files under Tesseract-ocr/tessdata to/usr/local/share/tessdata

Installation is complete.

Test it:

Switch to the tesseract-3.01 root directory after decompression (this directory has a self-phototest.tif can be used for testing)

command line:

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1	tesseract phototest.tif phototest -l eng

Output:

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12	Tesseract Open Source OCR Engine v3.01 with LeptonicaPage 0

In this case, a phototest.txt text file should be generated in the current directory, and the content is the text displayed phototest.tif.

Reference Document: http://my.oschina.net/iceman/blog/40771

Configuration document:

#安装leptonica

Yum-y Install gcc gcc-c++ make

Yum-y Install autoconf Automake libtool

Yum-y Install libjpeg-devel libpng-devel libtiff-devel zlib-devel

wget http://www.leptonica.org/source/leptonica-1.72.tar.gz

Tar zxvf leptonica-1.72.tar.gz

CD leptonica-1.72

./configure

Make

Make install

#安装tesseract-OCR

wget https://tesseract-ocr.googlecode.com/files/tesseract-ocr-3.02.02.tar.gz

Tar zxvf tesseract-ocr-3.02.02.tar.gz

CD tesseract-ocr/

./autogen.sh

./configure

Make

Make install

Ldconfig

cd/root/

wget https://tesseract-ocr.googlecode.com/files/tesseract-ocr-3.02.eng.tar.gz

Tar zxvf tesseract-ocr-3.02.eng.tar.gz

Mv/root/tesseract-ocr/tessdata/usr/local/share/tessdata

#测试

CD tesseract-ocr/

Tesseract phototest.tif Phptotest-l Eng

ll phpto*

Installing Leptonica, TESSERACT-OCR