IEEE Trans Image Process - Power-constrained contrast enhancement algorithm using multiscale retinex for OLED display.

Tópicos

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Resumo

This paper presents a power-constrained contrast enhancement algorithm for organic light-emitting diode display based on multiscale retinex (MSR). In general, MSR, which is the key component of the proposed algorithm, consists of power controllable log operation and subbandwise gain control. First, we decompose an input image to MSRs of different sub-bands, and compute a proper gain for each MSR. Second, we apply a coarse-to-fine power control mechanism, which recomputes the MSRs and gains. This step iterates until the target power saving is accurately accomplished. With video sequences, the contrast levels of adjacent images are determined consistently using temporal coherence in order to avoid flickering artifacts. Finally, we present several optimization skills for real-time processing. Experimental results show that the proposed algorithm provides better visual quality than previous methods, and a consistent power-saving ratio without flickering artifacts, even for video sequences.

Resumo Limpo

paper present powerconstrain contrast enhanc algorithm organ lightemit diod display base multiscal retinex msr general msr key compon propos algorithm consist power control log oper subbandwis gain control first decompos input imag msrs differ subband comput proper gain msr second appli coarsetofin power control mechan recomput msrs gain step iter target power save accur accomplish video sequenc contrast level adjac imag determin consist use tempor coher order avoid flicker artifact final present sever optim skill realtim process experiment result show propos algorithm provid better visual qualiti previous method consist powersav ratio without flicker artifact even video sequenc

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