Concept

Printer (computing)

Related publications (102)

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

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

Protecting identity documents by microstructure color differences

Roger Hersch

The development of plastic card printers has led to the widespread use of identity documents printed on plastic cards, such as ID cards, driving licenses, and access key cards. This paper presents a new security feature based on a technique for embedding a ...

2004

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

Techniques for Color-Gamut Reduction

Roger Hersch, Sylvain Chosson

Printing with custom inks is of interest both for artistic purposes and for printing security documents such as banknotes. However, in order to create designs with only a few custom inks, a general purpose high-quality gamut reduction technique is needed. ...

2003

Prediction of monochrome reflectance spectra with an extended Kubelka-Munk model

Roger Hersch, Patrick Emmel, Safer Mourad

We present a prediction model for digital printers and more specifically for electrophotographic devices. On the one hand, we propose an electrophotographic simulation model which estimates the microscopic structure of any printed toner layer based on its ...

Society for Imaging Science and Technology2002

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

Protecting identity documents with a just noticeable microstructure

Roger Hersch

The development of plastic card printers has led to the widespread use of identity documents printed on plastic cards, such as ID cards, driving licenses and access key cards. This paper presents a new security feature based on a technique for embedding a ...

SPIE-Int. Soc. Opt. Eng2002

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

Predicting transmittance spectra of electrophotographic color prints

Roger Hersch, Patrick Emmel, Safer Mourad

For dry toner electrophotographic color printers, we present a numerical simulation model describing the color printer response based on a physical characterization of the different electrophotographic process steps. The proposed model introduces a Cross T ...

Society of Photo-Optical Instrumentation Engineers2001

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