Inverse warping
y
y’
x
x’
f(x,y)
g(x’,y’)
Get each pixel g(x’,y’) from its corresponding location
           (x,y) = h-1(x’,y’) in the first image
Q:  what if pixel comes from “between” two pixels?
A:  resample color value
We discussed resampling techniques before
nearest neighbor, bilinear, Gaussian, bicubic