Abstract
In this paper, we propose an improved color-gamut method
for liquid crystal displays (LCD) with multi-phosphor white light emitting
diodes (MPW LED) and a modified rich color image processing approach with
skin protection. The color saturation is always used to broaden the color-gamut.
By increasing the color saturation, the expanded color-gamut can be observed
in the CIE 1931 color space. The human skin color is typically memorized by
color information. In order to increase the color saturation, the traditional
rich color method makes skin color appear unnatural, so a modified rich color
method with human skin color protection is proposed. The skin color protection
generates normalized chrominance and illumination features. The skin chrominance
model uses the normalized color-information of the skin as a classifier in
a real-time skin pixel detection system. Several geometric patterns are used
to tune the skin chrominance model with the principal components in color
space to give the system a better detection performance. Consequently, the
skin region information is used to tune the enhancement parameter in the modified
rich color image processing approach. In comparison, the proposed approach
yields a better image quality than the traditional one. In mobile display
systems, due to the limitation of bandwidth and memory capacity, determining
how to realize the functions of a wide color-gamut improvement method with
skin protection on mobile display platform is very important. Ultimately,
we have implemented our proposed method in the FPGA and displayed the image
on the ARM platform.
© 2012 IEEE
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