Abstract
This paper presents a low power, low complexity and high hardware
efficiency automatic white balance algorithm based on histogram matching
(AWB-HM) for active-matrix organic light-emitting diode (AMOLED) driving.
The main idea of AWB-HM algorithm is to reduce the display power by
power constraint, and then increase the overlap area (OA) of three
color histograms by histogram matching. The computation complexity
in the proposed algorithm is reduced without estimating the gains
of red, green, and blue channels in the conventional automatic white
balance (AWB) algorithms. Moreover, adders rather than multipliers
are mainly used in the algorithm, which is easier for the hardware
realization. The simulation results show that the value of OA for
the images processed by the proposed algorithm is 26.4% and 58.7%
larger than that of gray-world (GW) and white-patch (WP) algorithm,
respectively. Furthermore, the power dissipation and the time complexity
is reduced compared with other algorithms. The proposed algorithm
has been applied to AMOLED and the color cast of image is improved
significantly.
© 2014 IEEE
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