Abstract
This paper proposes a new backlight dimming algorithm based on color distortion-aware
error control. Conventional backlight dimming based on an error control
algorithm simply determines a clipping point by considering the clipping
error where the gray levels of pixels are saturated at the highest
displayable gray level, thereby producing an image with color distortion.
In contrast, the proposed algorithm estimates color distortion generated
by the clipping error in advance after analyzing the color ratio of
an input image. Next, the proposed algorithm determines the optimal
clipping point to ensure that the image quality is as similar as possible
to the objective target image quality. According to the simulation
results, the proposed algorithm reduced the average color distortion
significantly by up to 47.530% compared with the conventional algorithm,
while it preserved the objective image quality at almost the same
level as the conventional algorithm. In addition, the proposed algorithm
reduced the average computational time by up to 6.512
$\mu{{s}}$
(75.256%
reduction) compared with the conventional algorithm.
© 2014 IEEE
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