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An Ink Spreading Model for Dot-On-Dot Spectral Prediction

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Color images visible under UV light

Roger Hersch, Sylvain Chosson, Philipp Donzé

The present contribution aims at creating color images printed with fluorescent inks that are only visible under UV light. The considered fluorescent inks absorb light in the UV wavelength range and reemit part of it in the visible wavelength range. In con ...

2007

An Ink Spreading Model for Dot-On-Dot Spectral Prediction

Roger Hersch, Adish Kumar Singla

Due to increasing printing accuracies and the possibility of printing several droplets at the same pixel location, there is a renewed interest in dot-on-dot printing models. In the present contribution, we improve a dot-on-dot spectral prediction model rel ...

2006

Spectral reflection and dot surface prediction models for color halftone prints

Roger Hersch, Patrick Emmel, Frédérique Crété

The proposed new spectral reflection model enhances the classical Clapper-Yule model by taking into account the fact that proportionally more incident light through a given colorant surface is reflected back onto the same colorant surface than onto other c ...

2005

Prediction model for color separation, calibration and control of printers

Roger Hersch, Patrick Emmel

The present invention facilitates the calibration of printers and the color separation of input images into a set of inks by disclosing methods and systems for populating device-calibration lookup tables. The disclosed methods and systems rely on a compreh ...

2005

Improving the Yule-Nielsen modified spectral Neugebauer model by dot surface coverages depending on the ink superposition conditions

Roger Hersch, Frédérique Crété

The improvement of Yule-Nielsen modified spectral Neugebauer model incorporating a single halftone reproduction curve of various ink by dot surfaces coverages depending on the ink superposition conditions was analyzed. In the first model, the ink spreading ...

2005

Spectral prediction and dot surface estimation models for halftone prints

Roger Hersch, Patrick Emmel, Frédérique Crété

We propose a new spectral prediction model as well as new approaches for modeling ink spreading which occurs when printing ink layer superpositions. The spectral prediction model enhances the classical Clapper-Yule model by taking into account the fact tha ...

SPIE-Int. Soc. Opt. Eng2003

Modeling ink spreading for color prediction

Roger Hersch, Patrick Emmel

This study aims at modeling ink spreading in order to improve the prediction of the reflection spectra of three ink color prints. Ink spreading is a kind of dot gain which causes significant color deviations in ink jet printing. We have developed an ink sp ...

Soc. Imaging Sci. & Technol2002

Prediction of the Reflection Spectra of Three Ink Colour Prints

Roger Hersch, Patrick Emmel

We have developed a colour prediction model and an ink-spreading model. The present study aims at confirming the validity of both models for the case of ink-jet prints using cyan, magenta and yellow inks. Our colour prediction model, augmented by the ink-j ...

Society for Imaging Science and Technology2001

Exploring ink spreading

Roger Hersch, Patrick Emmel

This study aims at exploring ink spreading, which causes significant colour deviations in ink-jet printing. We present a method for investigating this phenomenon by considering only a limited number of cases. Using a combinatorial approach based on Polya's ...

Society for Imaging Science and Technology2000

Stochastic clustered-dot dithering

Roger Hersch

A new technique for building stochastic clustered-dot screens is being proposed. A large dither matrix comprising thousands of stochastically laid out screen dots is constructed by first laying out the screen dot centers. Screen dot centers are obtained by ...

SPIE-Int. Soc. Opt. Eng1999