Cross-content quality scaling of TID2013 image quality dataset

This dataset improves the accuracy and consistency of the quality scores for the TID2013 image quality dataset: http://www.ponomarenko.info/tid2013.htm (Version 1.0) The details in this improved quality scores can be found in the paper: Aliaksei Mikhailiuk, María Pérez Ortiz and Rafał K. Mantiuk "Psychometric scaling of TID2013 dataset" Proc. of 10th International Conference on Quality of Multimedia Experience (QoMEX 2018) http://www.cl.cam.ac.uk/~rkm38/pdfs/mikhailiuk2018tid_psych_scaling.pdf. More details about the data files included is available in the README.txt file.