- 1 year ago
How to use Tesseract OCR with Cmake on Windows?
To use Tesseract OCR with CMake on Windows, you'll need to follow these steps:
Install Tesseract OCR: Download and install the Tesseract OCR library for Windows from the official Tesseract GitHub repository or the Tesseract OCR website. Make sure to install both the Tesseract OCR engine and the language data files for the languages you intend to use.
Set Tesseract OCR Environment Variables: Set the necessary environment variables to make Tesseract OCR accessible to CMake and your C++ project. Open a command prompt and run the following commands:
shellsetx TESSDATA_PREFIX "C:\path\to\tesseract\tessdata"
setx PATH "%PATH%;C:\path\to\tesseract"
Replace
"C:\path\to\tesseract\tessdata"
and"C:\path\to\tesseract"
with the actual paths where you installed Tesseract OCR.Create a CMakeLists.txt File: Create a
CMakeLists.txt
file in the root directory of your C++ project. This file defines the build configuration and dependencies for your project. Here's an example of a basicCMakeLists.txt
file:cmakecmake_minimum_required(VERSION 3.0)
project(YourProjectName)
find_package(Tesseract REQUIRED)
include_directories(${Tesseract_INCLUDE_DIRS})
add_executable(YourExecutable main.cpp)
target_link_libraries(YourExecutable ${Tesseract_LIBRARIES})
Make sure to replace
YourProjectName
with the actual name of your project,main.cpp
with the name of your source file, and adjust any additional project-specific configurations as needed.Configure and Build Your Project: Open a command prompt, navigate to the root directory of your project, and run the following commands:
shellmkdir build
cd build
cmake ..
cmake --build .
This will create a
build
directory, configure the project with CMake, and build the project using the configured settings.Use Tesseract OCR in Your C++ Code: Now, you can include the necessary headers and use the Tesseract OCR functions in your C++ code. Here's an example of how you can use Tesseract OCR to perform OCR on an image:
cpp#include <tesseract/baseapi.h>
#include <leptonica/allheaders.h>
int main()
{
tesseract::TessBaseAPI tess;
tess.Init(nullptr, "eng");
Pix* image = pixRead("path/to/your/image.png");
tess.SetImage(image);
char* text = tess.GetUTF8Text();
printf("OCR Result: %s\n", text);
tess.End();
delete[] text;
pixDestroy(&image);
return 0;
}
Adjust the code according to your specific OCR requirements and image paths.
By following these steps, you should be able to configure and build your C++ project with CMake to use Tesseract OCR on Windows.