Mastering OpenCV 4 - Third Edition

Compile OpenCV.js

To compile OpenCV.js, we need to install Emscripten. Emscripten requires the following:

• Python 2.7
• Node.js
• cmake
• Java runtime

We can install these dependencies following the next instructions:

# Install Python
sudo apt-get install python2.7

# Install node.js
sudo apt-get install nodejs

# Install CMake (optional, only needed for tests and building Binaryen)
sudo apt-get install cmake

# Install Java (optional, only needed for Closure Compiler minification)
sudo apt-get install default-jre

Now, we have to download Emscripten from the GitHub repository:

# Get the emsdk repo
git clone https://github.com/juj/emsdk.git

# Enter that directory
cd emsdk

Now, we only have to update and install the environment variables required ...