No-reference Anisotroptic Quality Index

This Matlab toolbox implements the no-reference Anisotropic Quality Index (AQI). Such measure is based on the generalized Rényi entropy applied in a spatial/spatial-frequency framework. Namely, the AQI is based on determining the variance of the entropy of a given image over a set of predefined directions. The suitability of the AQI measure has been statistically endorsed through the application of standard benchmarking parameters that showed good match with the Mean Opinion Scores (MOS) or Differential Mean Opinion Scores (DMOS) provided by the conventional image databases.