(2)Non-linearly reduce the influence based on the radius

Always reordering

r is the distance between the pixel and the center of the mask

if(Ii>Tii)

in = 255-Ii;

else

{

in = 255 - Ii;

in = in * pow((double)(r+1),-0.2);// (-0.5,-0.2,-0.01)non-linear;//influence slow down }