EPFL Objective Video Quality Measures

Researchers at EPFL have proposed three objective video quality measures [136,137,154,135]. These measures are Moving Picture Quality Metric (MPQM), Color MPQM (CMPQM), and Normalization Video Fidelity Metric (NVFM). Unlike the ITS model, which considers only the luminance values, EPFL measures consider both luminance and chrominance values. The correlation with subjective tests is reasonable for some video sequences, but gives bad correlation for others (see Section 6.6). In addition, as explained next, they are not suitable for real-time evaluation of the quality as they operate on both the original and distorted sequences. Another disadvantages are: they are not consistent over all video bit rate ranges and they are computationally complex. We give some details about these metrics bellow (for a complete description of each of them see [135]).