A generalized Clapper-Yule model of halftone reflectance

Rogers, GL

doi:10.1002/1520-6378(200012)25:6<402::aid-col4>3.0.co;2-6

Cited by 37 publications

(13 citation statements)

References 14 publications

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“…Other extensions of the Clapper-Yule model for lowfrequency screens exist, e.g., the one proposed by Rogers [4].…”

Section: Clapper-yule-based Spectral Prediction Model For Predicting supporting

confidence: 92%

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Spectral prediction model for color prints on paper with fluorescent additives

Hersch¹

2008

Appl. Opt.

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I propose a model for predicting the total reflectance of color halftones printed on paper incorporating fluorescent brighteners. The total reflectance is modeled as the additive superposition of the relative fluorescent emission and the pure reflectance of the color print. The fluorescent emission prediction model accounts for both the attenuation of light by the halftone within the excitation wavelength range and for the attenuation of the fluorescent emission by the same halftone within the emission wavelength range. The model's calibration relies on reflectance measurements of the optically brightened paper and of the solid colorant patches with two illuminants, one including and one excluding the UV components. The part of the model predicting the pure reflectance relies on an ink-spreading extended Clapper-Yule model. On uniformly distributed surface coverages of cyan, magenta, and yellow halftone patches, the proposed model predicts the relative fluorescent emission with a high accuracy (mean ΔE 94 ¼ 0:42 under a D65 standard illuminant). For optically brightened paper exhibiting a moderate fluorescence, the total reflectance prediction improves the spectral reflectance prediction mainly for highlight color halftones, comprising a proportion of paper white above 12%. Applications include the creation of improved printer characterization tables for color management purposes and the prediction of color gamuts for new combinations of optically brightened papers and inks.

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“…Other extensions of the Clapper-Yule model for lowfrequency screens exist, e.g., the one proposed by Rogers [4].…”

Section: Clapper-yule-based Spectral Prediction Model For Predicting supporting

confidence: 92%

“…A variety of models exists for predicting the color of cyan, magenta, yellow, and black halftones printed on paper [1][2][3][4][5][6]. Since these models ignore the influence of the paper fluorescence, their prediction accuracy may be limited, especially for color halftones printed on paper incorporating fluorescent brighteners.…”

Section: Introductionmentioning

confidence: 99%

Spectral prediction model for color prints on paper with fluorescent additives

Hersch¹

2008

Appl. Opt.

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“…Therefore, the probability of light exiting from a given colorant is set equal to the colorant's fractional surface coverage. Rogers 22 generalizes the Clapper-Yule model by modeling lateral scattering within the paper as a point spread function and by deducing the probabilities that light entering through a colorant n emerges from the coated paper through a colorant m, possibly traversing, due to multiple reflections, further intermediate colorants. Emmel and Hersch's unified model 23 also takes into account multiple internal reflections and modelizes lateral scattering probabilities by an exponential function with a circular symmetry and a strong radial decay.…”

Section: ͑4͒mentioning

confidence: 99%

Spectral reflection and dot surface prediction models for color halftone prints

Hersch

Emmel

Collaud

et al. 2005

J. Electron. Imaging

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“…[10][11][12] Reflectance models accounting for the internal Fresnel reflections are extensions of the Clapper-Yule model [13][14][15] or of the Kubelka-Munk model. 16 Recent extensions of the Kubelka-Munk model [17][18][19] concern absorbing and inhomogeneous scattering media, such as prints in which the solid ink partially penetrates into the diffusing substrate.…”

Section: Introductionmentioning

confidence: 99%

Reflectance and transmittance model for recto-verso halftone prints

Hébert

Hersch

2006

J. Opt. Soc. Am. A

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We propose a spectral prediction model for predicting the reflectance and transmittance of recto-verso halftone prints. A recto-verso halftone print is modeled as a diffusing substrate surrounded by two inked interfaces in contact with air (or with another medium). The interaction of light with the print comprises three components: (a) the attenuation of the incident light penetrating the print across the inked interface, (b) the internal reflectance and internal transmittance that accounts for the substrate's intrinsic reflectance and transmittance and for the multiple Fresnel internal reflections at the inked interfaces, and (c) the attenuation of light exiting the print across the inked interfaces. Both the classical Williams-Clapper and Clapper-Yule spectral prediction models are special cases of the proposed recto-verso reflectance and transmittance model. We also extend the Kubelka-Munk model to predict the reflectance and transmittance of recto-verso halftone prints. The extended Kubelka-Munk model is compatible with the proposed recto-verso reflectance and transmittance model. In the case of a homogeneous substrate, the recto-verso model's internal reflectance and transmittance can be expressed as a function Kubelka-Munk's scattering and absorption parameters, or the Kubelka-Munk's scattering and absorption parameters can be inferred from the recto-verso model's internal reflectance and transmittance, deduced from spectral measurements. The proposed model offers new perspectives both for spectral transmission and reflection predictions and for characterizing the properties of printed diffuse substrates.

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A generalized Clapper-Yule model of halftone reflectance

Cited by 37 publications

References 14 publications

Spectral prediction model for color prints on paper with fluorescent additives

Spectral prediction model for color prints on paper with fluorescent additives

Spectral reflection and dot surface prediction models for color halftone prints

Reflectance and transmittance model for recto-verso halftone prints

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