CollimatorDesktop depends on opencv4, cfitsio and indilib 1.9
sudo apt-get install -y cmake g++ build-essential qt5-default libindi-dev libopencv-dev libcfitsio-dev zlib1g-devFor other distros, you can install opencv4, cfitsio and indilib from sources or install thorugh package manager.
Enter Collimator dir and run:
qmake && make -j$(nproc)