Calculate OpticalFlow with (multi)CPU/GPU based on image/video

/cflow is the C++ realization of the algorithm.
/pyflow is a python warper
Directly decoding from video can save much IO time.

Requirement

Opencv >= 3.0 with GPU Support and Contrib installed

Usage

mkdir build
cd build
cmake ..
make

Their will be three executable files in bin/
./calOpticalFlowFromVideo -i=../data/v_ApplyEyeMakeup_g01_c01.avi -f=../out/ -s=1 -d=0 -t=1

Or use python warper showed in pyflow/

Comparison

Original images:

Results of different methods:

Results using gpu/cpu mehtods: