calcOpticalFlowPyrLK from opencv, compute transverse only
mkdir build
cd build
cmake ..
make -j
./stereo_optical_flowback
Set the path of your image at stereo_optical_flowback.cpp
// KITTI1_1 KITTI1_2
string file_1 = "../kitti0_l.png"; // first image
string file_2 = "../kitti0_r.png"; // second image