This repo is for using GPU and opencv4 to extract videos' dense optical flow fields
I updated the code from Yang Wang's repo so that it could be used with the latest version of opencv.
| Option | Name | Default | Note |
|---|---|---|---|
| f | vidFile | ex.avi | filename of video |
| x | xFlowFile | x | filename prefix of flow x component |
| y | yFlowFile | y | filename prefix of flow x component |
| m | mFlowFile | m | filename prefix of merged flow images |
| i | imgFile | i | filename prefix of image |
| b | bound | 20 | specify the maximum (px) of optical flow |
| t | type | 1 | specify the optical flow algorithm |
| d | device_id | 0 | specify gpu id |
| s | step | 1 | specify the step for frame sampling |
| h | height | 0 | specify the height of saved flows, 0: keep original height |
| w | width | 0 | specify the width of saved flows, 0: keep original width |
mkdir flow
./denseFlowGpu -f=ex.avi -x=flow/x -y=flow/y -i=flow/i -b=20 -t=1 -d=0 -s=1 -h=0 -w=0
ex.avi is the input video
flow/ is the folder containing the extracted RGB frames and optical flows
If you have the opencv in /usr/local/include/opencv4:
mkdir build
cd build
cmake ..
make
The executable will be inside the build folder.