User-preferred color temperature conversion for video on TV or PC

Park, Du‐Sik; Kim, Sang-Kyun; Kim, Chang-Yeong; Choi, Won-Hee; Lee, Seong-Deok; Seo, Yang-Seock

doi:10.1117/12.475440

Cited by 5 publications

(2 citation statements)

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“…Park et al [9] developed a method to optimize memory colors in YC b C r color space for the color reproduction on digital TV. The skin color distribution was modeled with a bivariate Gaussian probability density function.…”

Section: Introductionmentioning

confidence: 99%

Preferred skin color enhancement for photographic color reproduction

Zeng

Luo

2011

Color Imaging XVI: Displaying, Processing, Hardcopy, and Applications

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Skin tones are the most important colors among the memory color category. Reproducing skin colors pleasingly is an important factor in photographic color reproduction. Moving skin colors toward their preferred skin color center improves the color preference of skin color reproduction. Several methods to morph skin colors to a smaller preferred skin color region has been reported in the past. In this paper, a new approach is proposed to further improve the result of skin color enhancement. An ellipsoid skin color model is applied to compute skin color probabilities for skin color detection and to determine a weight for skin color adjustment. Preferred skin color centers determined through psychophysical experiments were applied for color adjustment. Preferred skin color centers for dark, medium, and light skin colors are applied to adjust skin colors differently. Skin colors are morphed toward their preferred color centers. A special processing is applied to avoid contrast loss in highlight. A 3-D interpolation method is applied to fix a potential contouring problem and to improve color processing efficiency. An psychophysical experiment validates that the method of preferred skin color enhancement effectively identifies skin colors, improves the skin color preference, and does not objectionably affect preferred skin colors in original images.

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Section: Introductionmentioning

confidence: 99%

Preferred skin color enhancement for photographic color reproduction

Zeng

Luo

2011

Color Imaging XVI: Displaying, Processing, Hardcopy, and Applications

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“…In addition, he did not propose any method to determine the optimal converting point of target CT. Some recent investigations suggested methods to implement CT conversion [11][12][13]. These researches established the user-preferred CT model from the experiment and determined the optimal converting point of CT conversion from their model.…”

Section: Introductionmentioning

confidence: 99%

Determination of optimal converting point of color temperature conversion complied with ANSI C78 377 for indoor solid-state lighting and display applications

Hsieh¹,

Ouyang²,

Huang³

et al. 2012

Opt. Express

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In recent years, displays and lighting require color temperature (CT) conversion function because observers have different preferences. This paper proposes effective methods to determine the optimal converting point of CT conversion for display and lighting application. For display application, the concepts of center of gravity and isotemperature line are applied to determine the optimal converting point. The maximal enhancement of luminance between the optimal and average is 18%. For lighting application, this paper proposes two methods to determine the optimal converting point in the CT quadrangle which complies with ANSI C78. 377. The enhancement of luminance in two CT modes (5700K and 6500K) are 14.2% and 23.6%, respectively.

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