A low complexity automatic white balance algorithm for AMOLED hardware driving using histogram shifting with compensation

Abstract

ABSTRACTAutomatic white balance (AWB) is one of the most important functions for display devices. As to active-matrix organic light-emitting diode (AMOLED) driving, it not only needs reasonable colour cast correcting results, but also require high power efficiency. In the existing techniques, the power constraint is achieved resource-costly, and has not been applied in AWB algorithms. This article proposes an AWB algorithm combined with simple power constraint method and excellent colour cast correcting ability. Without the part of computing coefficients in conventional AWB algorithms, and replacing most of multiplications with additions, the computational complexity of the proposed algorithm is reduced. The experimental results show that the proposed algorithm is competitive with that of state-of-the-art AWB algorithms and the value of power dissipation for the images processed by the proposed algorithm is 33.76%, 19.95% and 41.26% smaller than grey-world (GW), white-patch (WP) and colour histogram stretching (CHS) algorithm, respectively. The proposed algorithm can also be implemented in AMOLED driving owing to its low computational complexity.AbbreviationPower Constraint(PD)