This chapter describes the whole family of mapping methods called minimum information loss methods. These methods are one of the contributions of this thesis. We developed these methods in order to determine exposure automatically. The methods follow, in a way, a photographers' approach. The main idea is to place the clipping interval so that a minimum amount of information is lost, thereby preserving the original contrast of all correctly displayed pixels.
Just as in interactive calibration (see section 4.2) a raw image histogram is used in the optimization process.