I am trying to find the best way to quantitatively analyze the quality of the orthos I am generating. Visual inspection is of course first order of business ( here is a good place to say kudos again to the awesome (!) curtain comparison tool https://opendronemap.github.io/UAVArena/ by @pierotofy and everyone else that contributed ).
But I am looking for a more quantitatively rigorous method /tools to compare orthomosaics after generation by different engines. For instance defining and measuring noise metrics, resolution, accuracy, geo-referencing etc.
Happy to hear suggestions.