Organisation of metrics folder

[csudre]

Is your feature request related to a problem? Please describe. The Metrics Reloaded consortium has classified the metrics in 3 main categories and it would be great to have them organised according to these categories for an easy match and reference between the consortium recommendations and the MONAI practical implementation

Describe the solution you'd like The three categories are the following: Counting metrics - Fbeta / IoU / Sensitivity@Specificity / Specificity@Sensitivity ... Multithreshold metrics - AUROC / FPROC / AP Distance based metrics - ASSD / MSD / NSD / HD / Boundary IoU

metrics could be for instance organised in sub-folders according to the category they belong to

Describe alternatives you've considered Possible alternative would be to gather all metrics of the same category in the same python class