| | :[1] A. Artusi, R. K. Mantiuk, T. Richter, P. Hanhart, P. Korshunov, M. Agostinelli, A. Ten, and T. Ebrahimi, “Overview and evaluation of the JPEG XT HDR image compression standard,” J. Real-Time Image Process., Dec. 2015. | | :[1] A. Artusi, R. K. Mantiuk, T. Richter, P. Hanhart, P. Korshunov, M. Agostinelli, A. Ten, and T. Ebrahimi, “Overview and evaluation of the JPEG XT HDR image compression standard,” J. Real-Time Image Process., Dec. 2015. |
| | :we found that for images, MOS=4 (on 5 point scale) corresponds roughly to Q=48 and MOS=4.5 to Q=52. However, this mapping is likely to be different for video or even a different experiment with images. | | :we found that for images, MOS=4 (on 5 point scale) corresponds roughly to Q=48 and MOS=4.5 to Q=52. However, this mapping is likely to be different for video or even a different experiment with images. |
| | :It is also important to note that MOS scale is not absolute. Two different MOS experiments, run on different days, with slightly different training will result in different MOS values. For example, LIVE dataset was measured in two sessions. Even though the same researchers ran both sessions and the same procedure and equipment was used, it was necessary to rescale the data from both sessions. | | :It is also important to note that MOS scale is not absolute. Two different MOS experiments, run on different days, with slightly different training will result in different MOS values. For example, LIVE dataset was measured in two sessions. Even though the same researchers ran both sessions and the same procedure and equipment was used, it was necessary to rescale the data from both sessions. |