- This folder contains three subfolders each of which contains 13 folders. There are 10 images in each folder: original 
high resolutin image labeled as "O", low resolution image labeled as "LR" and the results of 8 different interpolation 
algorithms. Folder factorX includes the results of interpolation algorithms by factor X. 

- "rankingScores.xlsx" contains the order of presentations in the subjective study as well as average rankng scores
given by subjects. 

Please cite the following paper if you used the database in your works. 

H. Yeganeh, M. Rostami, and Z. Wang. "Objective quality assessment of interpolated natural images."
Image Processing, IEEE Transactions on 24.11 (2015): 4651-4663.

@article{yeganeh2015objective,
  title={Objective quality assessment of interpolated natural images},
  author={Yeganeh, Hojatollah and Rostami, Mohammad and Wang, Zhou},
  journal={Image Processing, IEEE Transactions on},
  volume={24},
  number={11},
  pages={4651--4663},
  year={2015},
  publisher={IEEE}
}