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CHIPQA: No-Reference Video Quality Assessment using Space-Time Chips

This repository contains code for ChipQA and ChipQA-0.

Please cite ChipQA if you use this work: J. P. Ebenezer, Z. Shang, Y. Wu, H. Wei, S. Sethuraman and A. C. Bovik, "ChipQA: No-Reference Video Quality Prediction via Space-Time Chips," in IEEE Transactions on Image Processing, vol. 30, pp. 8059-8074, 2021, doi: 10.1109/TIP.2021.3112055.

The IEEE link is https://ieeexplore.ieee.org/document/9540785 and you can find a free preprint here: https://arxiv.org/abs/2109.08726.

Requirements

See requirements.txt

Feature extraction

To extract features on SDR 8 bit MP4 or AVI files, run


python3 chipqa.py --input_file path/to/input_file --results_folder path/to/output_file

input_file is the .mp4 video from which chipqa features will be extracted. output_file will contain the features that are written out.

To extract features on SDR YUV or HDR YUV files, run


python3 chipqa_yuv.py --input_file path/to/input_file --results_folder path/to/output_file --width W --height H --bit_depth {8/10/12} --color_space {BT2020/BT709}

Note that metadata such as height, width, bit depth, and color space have to be specified for YUV files.

Training with a generic database

Run


python3 cleaner_svr.py --score_file /path/to/score.csv --feature_folder feature_folder --train_and_test

See python clearner_svr.py --help for more options and descriptions of arguments.

Training with LIVE-APV Livestream VQA database

After extracting the features, run


python3 zip_feats_and_scores.py input_folder csv_file output_file

Here input_folder must contain the features generated from the previous step, csv_file must be a csv file with LIVE-APV database names and scores, and output_file will be where the combined features and scores will be stored.

After this, run


python3 svr.py input_file output_folder

to evaluate. input_file must be the path where the zipped features and scores are saved. The predictions and the ground truth MOS for each of the runs will be stored in output_folder.

all_srocc.m can then be used to find the SROCC and LCC.

Testing on a new database with a pretrained SVR

  1. Run chipqa.py with the path to the folder of videos and the output directory.
  2. Run testing.py with a path to the input feature file(s).