Hue-Preserving Unsharp-Masking for Color Image Enhancement

Zihan YU  Kiichi URAHAMA  

IEICE TRANSACTIONS on Information and Systems   Vol.E97-D   No.12   pp.3236-3238
Publication Date: 2014/12/01
Publicized: 2014/09/22
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2014EDL8159
Type of Manuscript: LETTER
Category: Image Processing and Video Processing
hue-preserving unsharp-masking,  image enhancement,  contrast magnification,  image sharpening,  color tone,  scene depth,  

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We propose an unsharp-masking technique which preserves the hue of colors in images. This method magnifies the contrast of colors and spatially sharpens textures in images. The contrast magnification ratio is adaptively controlled. We show by experiments that this method enhances the color tone of photographs while keeping their perceptual scene depth.