The exemplary embodimentsof the present disclosureare described and illustrated below toencompass methods and devices fordesigning patient specific prostheticcutting jigs and, more specifically, todevices and methods for segmentingbone of the knee and the resultingcutting guides themselves. Moreover,the present disclosure relates tosystems and methods for manufacturingcustomized surgical devices, morespecifically, the present disclosurerelates to automated systems and methodsof arthroplasty cutting guides,systems and methods for image segmentationin generating computermodels of knee joint.