Denseflow

Extracting dense flow field given a video.

Features

• support multiple optical flow algorithms
• support single video (or a frame folder) / a list of videos (or a list of frame folders) as input
• support multiple output types (image, hdf5)
• faster, 40% faster (by parallelize IO & computation)
• record the progress when extract a list of videos (Note: restart from the recent "done video", that is, the recent "approximately done video" may not actually done)

Install

Dependencies:

• OpenCV: opencv3 | opencv4
• CUDA (driver version > 400)
• Boost
• HDF5 (Optional)

git clone https://github.com/innerlee/denseflow
mkdir build && cd build
cmake -DCMAKE_INSTALL_PREFIX=$HOME/app ..
make -j
make install

Usage

Extract optical flow of a single video

denseflow test.avi -b=20 -a=tvl1 -s=1 -v

• test.avi: input video / videolist.txt
• tmp: folder containing RGB images and optical flow images
• dir: output generated images to folder.
• tvl1: optical flow algorithm
• v: verbose
• s: step, extract frames only when step=0

Extract optical flow of a list of videos

• resize
• class folder
• input image

denseflow videolist.txt -b=20 -a=tvl1 -s=1 -v

• videolist.txt: input video / videolist.txt
• tmp: folder containing RGB images and optical flow images
• dir: output generated images to folder.
• tvl1: optical flow algorithm
• v: verbose
• s: step, extract frames only when step=0

Credits

Modified based on yuanjun's fork of dense_flow.

Main Authors:

Shiguang Wang, Zhizhong Li