Hello all, I am trying to fit a surface to a 1920x1080 grid of evenly spaced data points. The values are supposed to be more or less uniform (its an image of a uniform white light source). So I would like to fit a plane to it (but maybe a paraboloid if it is not quiete uniform). What method should I use? A least squares approach? I cant seem to find much on google for this. Does anyone have an approach, or perhaps could recommend some literature which covers this? Thanks!