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luminance enhancement using modified one-filter Retinex, chrominance enhancement using reference map, histogram rescaling for enhanced luminance and chrominance, hue component remains unchanged, posttreatment using the same principle of global mapping.
(a) luminance enhancement using modified one-filter Retinex, (b) chrominance enhancement using reference map, (c) histogram rescaling for enhanced luminance and chrominance, (d) hue component remains unchanged, (e) posttreatment using the same principle of global mapping.
Secondly, histogram rescaling is applied to both enhanced luminance and chrominance channel to realize normalization of the results.
and refer to the enhanced luminance and chrominance, and and refer to the luminance and chrominance after step 1 of global mapping.
where is the image luminance mask (estimation of local background), refers to then enhanced luminance (Retinex output), and refers to globally mapped luminance of step 1.
The hue component in CIELCh remains unchanged to maintain the hue constancy property, and the image is reconstructed with enhanced luminance and chrominance together with the unchanged hue component from CIELCh space to RGB space.
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To enhance luminance efficiency, high charge carrier mobility is required.
Figure 3 (a) Original image; (b) image enhanced by luminance histogram equalization; (c) image enhanced by NECI.
The company wants to enhance the luminance to 10lm and boost battery lifespan to 2 hours before commercializing the projector next year.
Then, we enhance the luminance part 'Y' of the image by using a newly developed sigmoid function.
In a conventional backlight, suppression of light loss caused by the prism film(s) is desired to enhance the luminance without sacrificing the viewing angle.
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