Installing_Rtesseract.md

In duncantl/Rtesseract: Interface to the tesseract OCR system

How to install Rtesseract

Rtesseract requires Tesseract to be installed, either 3.0X or 4.0X versions. For general notes on installing Tesseract, please see Compiling Tesseract for information from the Tesseract devs and Installing Tesseract for our notes.

Tested installs:

These are platforms where Rtesseract has been confirmed to install on, along with any notes or special instructions.

General notes:

• Requires the environment variable PKG_CONFIG_PATH set to include the appropriate location so the installer knows where to find tesseract and leptonica, e.g., /usr/local/lib/pkgconfig. This is a colon-separated collection of paths identifying directories that contain the .pc files specifying the information for an installed package.

• Compilation should use the C++11 standard. This means setting the --std=C++11 flag in CXXFLAGS. Otherwise, the compiler will issue warnings.

Linux

CentOS 7

Tesseract version | R version | Compiler | Notes ------------------|-----------|----------|------- 3.05.0X | 3.4.1 | g++ 6.2 | OK 4.00.00dev | 3.4.1 | g++ 6.2 | OK 4.00.00dev | 3.4.0 | g++ 4.8.5 | OK

Arch Linux

kernel 4.12.8.2

Tesseract version | R version | Compiler | Notes ------------------|-----------|----------|------- 3.05.0X | 3.4.1 | g++ 7.1. | OK 4.00.00dev | 3.4.1 | g++ 7.1 | OK 3.05.0X | 3.4.1 | clang 4.0.1 | OK 4.00.00dev | 3.4.1 | clang 4.0.1 | OK 3.05.0X | 3.4.1 | clang 5.0 | OK 4.00.00dev | 3.4.1 | clang 5.0 | OK

Debian

7.0 Jessie (rocker/rstudio Docker image)

Tesseract version | R version | Compiler | Notes ------------------|-----------|----------|------- 3.05.0X | 3.4.1 | g++ 6.3.0 | OK 4.00.00dev | 3.4.1 | g++ 6.3.0 | OK

OS X

Tesseract version | R version | Compiler | Notes ------------------|-----------|----------|------- 3.05.0X | 3.4.? | Apple clang | Cannot compile tesseract 4.00.00dev | 3.4.? | Apple clang | Cannot compile tesseract

MS Windows

Tesseract version | R version | Compiler | Notes ------------------|-----------|----------|------- 3.05.0X | 3.4.1 | g++ 6.3.0 | Have not attempted yet 4.00.00dev | 3.4.1 | g++ 6.3.0 | Have not attempted yet

libRexit.a

Required to stop Tesseract from terminating the R process when Tesseract hits an error.

Tesseract version | R version | Compiler | Linker| Notes ------------------|-----------|----------|-------| ------ 3.05.0X | 3.4.1 | g++ 7.2.0 | GNU ld 2.29 | 4.00.00dev | 3.4.1 | clang 5.00 | GNU ld 2.29 | OK 4.00.00alpha | 3.4.1 | clang 3.4.2 | GNU ld 2.25 | OK 4.00.00alpha | 3.4.1 | g++ 4.8.5 | GNU ld 2.25 | OK 4.00.00alpha | 3.4.1 | g++ 6.3.1 | GNU ld 2.27 | OK

duncantl/Rtesseract documentation built on March 25, 2022, 5:50 a.m.