Build with WasmEdge-OCR Plug-in

The WasmEdge-OCR plug-in provides optical character recognition (OCR) capabilities to WebAssembly applications running on WasmEdge. It is powered by Tesseract, an open-source OCR engine, and Leptonica, its image processing dependency.

Prerequisites

Install Tesseract and Leptonica development libraries on your system.

For Ubuntu 20.04:

sudo apt update
sudo apt install -y libtesseract-dev libleptonica-dev

For macOS:

brew install tesseract leptonica

Build WasmEdge with WasmEdge-OCR Plug-in

To enable the WasmEdge-OCR plug-in, developers need to build WasmEdge from source with the cmake option -DWASMEDGE_PLUGIN_OCR=ON.

cd <path/to/your/wasmedge/source/folder>
cmake -GNinja -Bbuild -DCMAKE_BUILD_TYPE=Release -DWASMEDGE_PLUGIN_OCR=ON
cmake --build build
cmake --install build

note

If the built wasmedge CLI tool cannot find the WasmEdge-OCR plug-in, you can set the WASMEDGE_PLUGIN_PATH environment variable to the plug-in installation path (such as /usr/local/lib/wasmedge/, or the built plug-in path build/plugins/wasmedge_ocr/) to try to fix this issue.

Then you will have an executable wasmedge runtime under /usr/local/bin and the WasmEdge-OCR plug-in under /usr/local/lib/wasmedge/libwasmedgePluginWasmEdgeOCR.so after installation.

For more information, you can refer to the GitHub repository.