How can I set the value of Extrapval in interp2?

I use interp2 to resample my image, but i have non value in my resampled image, I should set extrapval in interp2 but I don't know what is the appropriate value for this argument?

Answer 1

[sixwwwwww]

you should use value 0 or 255 for extrapval depending upon the image intensity values you are dealing with