The V3D Flow Builder is a GPU based tool that calculates the optical flow between two input images.
It can be used by slowmoVideo.
On Ubuntu 20.04, install the requirements freeglut3-dev libopencv-dev libglew-dev
git submodule update --init
mkdir build
cd build
cmake ..
make
# use compiled binary at v3d-flow-builder/build/src/slowmoFlowBuilder
# or install:
sudo make install