Could also be a high dynamic range operator: they do the same kind of thing to preserve contrast across large ranges of intensity. See Larson's paper http://gai

Could also be a high dynamic range operator: they do the same kind of thing to preserve contrast across large ranges of intensity. See Larson's paper http://gaia.lbl.gov/btech/papers/39882.pdf http://gaia.lbl.gov/btech/papers/39882.pdf etc.