Most basic example of adding an OpenCV C++ add-on into node.js
This example will help you to to get started with your computer vision project by linking OpenCV 3.4 with Native Abstractions for Node.js. Includes "opencv_contrib" so SIFT and SURF are available
Tested on Ubuntu 18.04. The tmp contains OpenCV 3.4 precompiled binaries in build zip archive. So if you are going to drive into development as fast as possible, you should
sudo apt update
sudo apt install unzip
unzip ../build.zip && cd build
sudo make install
sudo sh -c 'echo "/usr/local/lib" > /etc/ld.so.conf.d/opencv.conf'
sudo ldconfig
npm run install:opencv
cd packages/client
npm install
npm start
U.S. patents are valid for 20 years from the earliest filing date, but can be extended to 21 years if a Priority Date is used, and SIFT (US6711293B1) was filed (with priority) on 1999-03-08. This means that usage of the SIFT algorithm is no longer requires a license for use.