ENH: Improved blending function
ENH: Improved blending function

LucasGandel/TubeTK,cdeepakroy/TubeTK,LucasGandel/TubeTK,cdeepakroy/TubeTK,aylward/ITKTubeTK,KitwareMedical/TubeTK,LucasGandel/TubeTK,cdeepakroy/TubeTK,matthieuheitz/TubeTK,matthieuheitz/TubeTK,cdeepakroy/TubeTK,LucasGandel/TubeTK,aylward/ITKTubeTK,KitwareMedical/TubeTK,thewtex/TubeTK,matthieuheitz/TubeTK,KitwareMedical/ITKTubeTK,thewtex/TubeTK,sumedhasingla/TubeTK,KitwareMedical/ITKTubeTK,KitwareMedical/TubeTK,aylward/ITKTubeTK,aylward/ITKTubeTK,sumedhasingla/TubeTK,thewtex/TubeTK,KitwareMedical/ITKTubeTK,matthieuheitz/TubeTK,KitwareMedical/TubeTK,sumedhasingla/TubeTK,thewtex/TubeTK,KitwareMedical/ITKTubeTK,sumedhasingla/TubeTK