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In this paper, we show how tone mapping techniques can be used to dynamically increase the image brightness, thus allowing the LCD backlight levels to be reduced. This saves significant power as the majority of the LCD's display power is consumed by its backlight. The Gamma function (or equivalent) can be efficiently implemented in smartphones with minimal resource cost. We describe how we overcame the Gamma function's non-linear nature by using adaptive thresholds to apply different Gammadoi:10.1145/1999995.2000002 dblp:conf/mobisys/AnandTSKACB11 fatcat:wconpfkwevdini6vaqhhndmpgi