The image used in the demo can be found in the following link:
https://drive.google.com/open?id=1zwpNH8TuYkxr7RcRVPaSaXiNf139LtuT
You may cite it in your paper. Thanks a lot.
@article{zhou2020tensor,
title={Tensor oriented no-reference light field image quality assessment},
author={Zhou, Wei and Shi, Likun and Chen, Zhibo and Zhang, Jinglin},
journal={IEEE Transactions on Image Processing},
volume={29},
pages={4070--4084},
year={2020},
publisher={IEEE}
}