IEEE Trans Image Process - Fast Hue and Range Preserving Histogram: Specification: Theory and New Algorithms for Color Image Enhancement.

Tópicos

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Resumo

Color image enhancement is a complex and challenging task in digital imaging with abundant applications. Preserving the hue of the input image is crucial in a wide range of situations. We propose simple image enhancement algorithms which conserve the hue and preserve the range (gamut) of the R, G, B channels in an optimal way. In our setup, the intensity input image is transformed into a target intensity image whose histogram matches a specified, well-behaved histogram. We derive a new color assignment methodology where the resulting enhanced image fits the target intensity image. We analyse the obtained algorithms in terms of chromaticity improvement and compare them with the unique and quite popular histogram based hue and range preserving algorithm of Naik and Murthy. Numerical tests confirm our theoretical results and show that our algorithms perform much better than the Naik-Murthy algorithm. In spite of their simplicity, they compete with well-established alternative methods for images where hue-preservation is desired.

Resumo Limpo

color imag enhanc complex challeng task digit imag abund applic preserv hue input imag crucial wide rang situat propos simpl imag enhanc algorithm conserv hue preserv rang gamut r g b channel optim way setup intens input imag transform target intens imag whose histogram match specifi wellbehav histogram deriv new color assign methodolog result enhanc imag fit target intens imag analys obtain algorithm term chromat improv compar uniqu quit popular histogram base hue rang preserv algorithm naik murthi numer test confirm theoret result show algorithm perform much better naikmurthi algorithm spite simplic compet wellestablish altern method imag huepreserv desir

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