Color reproduction of human skin by spectral reflectance using RGB images and the Wiener estimation method

2017 ◽  
Author(s):  
Kiyomi Sato ◽  
Shota Miyazawa ◽  
Hideki Funamizu ◽  
Tomonori Yuasa ◽  
Izumi Nishidate ◽  
...  
Keyword(s):  
Human Skin ◽  
Spectral Reflectance ◽  
Estimation Method ◽  
Color Reproduction ◽  
Wiener Estimation ◽  
Rgb Images

scholarly journals Estimation of Melanin and Hemoglobin Using Spectral Reflectance Images Reconstructed from a Digital RGB Image by the Wiener Estimation Method

Sensors ◽  
2013 ◽  
Vol 13 (6) ◽  
pp. 7902-7915 ◽  
Author(s):  
Izumi Nishidate ◽  
Takaaki Maeda ◽  
Kyuichi Niizeki ◽  
Yoshihisa Aizu
Keyword(s):  
Spectral Reflectance ◽  
Estimation Method ◽  
Wiener Estimation ◽  
Rgb Image

scholarly journals Spectral Reconstruction Using an Iteratively Reweighted Regulated Model from Two Illumination Camera Responses

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 7911
Author(s):  
Zhen Liu ◽  
Kaida Xiao ◽  
Michael R. Pointer ◽  
Qiang Liu ◽  
Changjun Li ◽  
...  
Keyword(s):  
Spectral Reflectance ◽  
Imaging System ◽  
Estimation Method ◽  
Color Difference ◽  
Graphic Arts ◽  
Spectral Reconstruction ◽  
Acceptable Range ◽  
Rgb Images ◽  
Improved Accuracy ◽  
Specular Highlights

An improved spectral reflectance estimation method was developed to transform captured RGB images to spectral reflectance. The novelty of our method is an iteratively reweighted regulated model that combines polynomial expansion signals, which was developed for spectral reflectance estimation, and a cross-polarized imaging system, which is used to eliminate glare and specular highlights. Two RGB images are captured under two illumination conditions. The method was tested using ColorChecker charts. The results demonstrate that the proposed method could make a significant improvement of the accuracy in both spectral and colorimetric: it can achieve 23.8% improved accuracy in mean CIEDE2000 color difference, while it achieves 24.6% improved accuracy in RMS error compared with classic regularized least squares (RLS) method. The proposed method is sufficiently accurate in predicting the spectral properties and their performance within an acceptable range, i.e., typical customer tolerance of less than 3 DE units in the graphic arts industry.

Color adjustment algorithm adapted to the spectral reflectance estimation method

2014 ◽  
Vol 21 (3) ◽  
pp. 369-372 ◽  
Author(s):  
Tomonori Yuasa ◽  
Ryosuke Honma ◽  
Hideki Funamizu ◽  
Izumi Nishidate ◽  
Yoshihisa Aizu
Keyword(s):  
Spectral Reflectance ◽  
Estimation Method

Effect of Paper’s Spectral Reflectance on the Printing’s Dot Gain

2011 ◽  
Vol 236-238 ◽  
pp. 1246-1249
Author(s):  
Chen Fei Zhao ◽  
Qing Han
Keyword(s):  
Spectral Reflectance ◽  
Color Patch ◽  
Color Reproduction ◽  
Print Material ◽  
Printing Quality ◽  
Dot Gain ◽  
Light Color ◽  
Area Percentage

Paper is the main print material, whose performance is a factor that effects the printing’s dot gain which is bad to image clarity and color reproduction. In the paper, Yule-Nielsen neugebauer spectral modal is analyzed , and the relation between paper’s spectral reflectance and the printing’s dot gain is discussed. By experiments, the paper’s spectral reflectance is adopted as correction index, which can reduce the dot gain value of the light color patch , and in the same printing conditions the dot gain is effected by the paper’s spectral reflectance, ink’s type, dot area percentage and wavelengths. The research has a certain significance for controlling printing quality and reducing the producing cost.

Spectral Reflectance of Human Skin in the Region 0.7–2.6 µ

1955 ◽  
Vol 8 (3) ◽  
pp. 297-299 ◽  
Author(s):  
John A. Jacquez ◽  
John Huss ◽  
Wayne McKeehan ◽  
James M. Dimitroff ◽  
Hans F. Kuppenheim
Keyword(s):  
Human Skin ◽  
Spectral Reflectance

Investigation of arterial inflow and venous capacitance in human skin by use of RGB images

2009 ◽  
Author(s):  
Izumi Nishidate ◽  
Hayato Kaneko ◽  
Takaaki Maeda ◽  
Yoshihisa Aizu ◽  
Tetsuya Yuasa ◽  
...  
Keyword(s):  
Human Skin ◽  
Venous Capacitance ◽  
Arterial Inflow ◽  
Rgb Images

scholarly journals Color reproduction from low-SNR multispectral images using spatio-spectral Wiener estimation

2008 ◽  
Vol 16 (6) ◽  
pp. 4106 ◽  
Author(s):  
Yuri Murakami ◽  
Ken Fukura ◽  
Masahiro Yamaguchi ◽  
Nagaaki Ohyama
Keyword(s):  
Multispectral Images ◽  
Color Reproduction ◽  
Low Snr ◽  
Wiener Estimation
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