tesseract

Tesseract 打印字体识别引擎

1 安装

1.1 下载Leptonica源并安装:

$ wget http://www.leptonica.com/source/leptonica-1.76.0.tar.gz
$ tar xzvf leptonica-1.76.0.tar.gz
$ cd leptonica-1.76.0
$ ./configure & make & sudo make install

1.2 下载Tesseract源并安装:

$ wget https://sourceforge.net/projects/tesseract-ocr-alt/files/tesseract-ocr-3.02.02.tar.gz
$ tar xzf tesseract-ocr-3.02.02.tar.gz
$ cd tesseract-ocr
$ ./autogen.sh & ./configure & make & sudo make install & sudo ldconfig

1.3 下载语言文件：

$ wget https://sourceforge.net/projects/tesseract-ocr-alt/files/tesseract-ocr-3.02.eng.tar.gz
$ wget https://nchc.dl.sourceforge.net/project/tesseract-ocr-alt/tesseract-ocr-3.02.chi_sim.tar.gz
$ tar xzf tesseract-ocr-3.02.eng.tar.gz
$ sudo cp tesseract-ocr/tessdata/* /usr/local/share/tessdata

1.4 运行：

$ tesseract /path/to/input/test.jpg /path/to/output/abc.txt -l eng

2 报错：Error in pixReadStreamJpeg: function not present

读取jpeg stream错误，执行tesseract -v指令，发现缺少libjpeg，libpng，libtiff模块

安装libjpeg模块，yum install -y libjpeg-devel

安装libpng模块，yum install -y libpng-devel

安装libtiff模块，yum install -y libtiff-devel

重新安装leptonica