Figure 9
Top to bottom, left to right: faded Horse Rider image; EME, EME with entropy, EME using the Michelson contrast, and AME quality measures, as defined in [5]; second derivative of AME with respect to 
; values obtained as a function of α; defaded Horse Rider image obtained using the optimal α value. It is worth noticing that the AME measure has an interesting point in correspondence to the main change of curvature (minimum of its second derivative with respect to α), which coincides with the optimal α value selected by the 
scheme.