Spatially interpolate the scene radiance data by sFactor
scene = sceneInterpolate(scene,sFactor)
Spatially interpolate data in a scene structure by an amount sFactor.
If sFactor is a single number, then it is a scale factor that is applied
to both the rows and the columns. The result is rounded to an integer.
If sFactor is a 2D vector, the two entries are applied separately to the
row and column dimensions.
Copyright ImagEval Consultants, LLC, 2003.