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Rapid inkjet printing of high catalytic activity Co3O4 /N-rGO layers for oxygen reduction reaction

Publications associées (113)

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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

A Prediction Model for Reflection on Varnished Metallic Plates

Roger Hersch, Mathieu Hébert, Patrick Emmel

Several models predict the reflectance of a rough metallic surface. They are however not adapted to the surfaces used in the packaging industry, such as boxes made of printed metallic plates. For printing purposes, metallic surfaces need to be varnished. L ...

Society for Imaging Science and Technology2002

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

Parameterizable fonts based on shape components

Roger Hersch, Changyuan Hu

We propose a new, highly flexible font description method that explicitly describes characters as assemblies of parameterizable shape components. By varying global parameters, we can derive fonts that vary in weight, condensation, and shape. Fonts made of ...

2001

Predicting Monochrome Color Transmittance Spectra of Electrophotographic Prints

Roger Hersch, Patrick Emmel, Safer Mourad

We create a computer based numerical model to predict the color spectra of printed patches on dry toner electrophotographic printers. The goal of this research is to obtain a simplified model describing the input-output behavior of the printers based on th ...

Society for Imaging Science and Technology2000

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

Neugebauer and Demichel: dependence and independence in n-screen superpositions for colour printing

Roger Hersch, Isaac Amidror

The Neugebauer equations and the Demichel equations on which they are based are one of the basic tools for modeling colour printing systems that use the halftoning technique. However, these equations implicitly assume that the colour ink distributions in t ...

Wiley2000

Reproducing color images using custom inks

We investigate the general problem of reproducing color images on an offset press using custom inks in any combination and number. While this problem has been explored previously for the case of two inks, there are a number of new mathematical and algorith ...

ACM, New York, NY, USA1998

Multi-level colour halftonning algorithms

Roger Hersch, Isaac Amidror, Patrick Emmel

Methods for the halftoning of images on multi-level printing devices such as multi-level ink-jet printers are presented. Due to the relatively large size of single droplets, halftoning algorithms are still needed. However, since halftoning occurs between t ...

SPIE-Int. Soc. Opt. Eng1997

Dithering algorithms for variable dot size printers

Roger Hersch, Isaac Amidror, Patrick Emmel

Dither-based methods for the halftoning of images on multi-level printing devices such as multi-level inkjet printers are presented. Due to the relatively large size of single droplets, halftoning algorithms are still needed. However, since halftoning occu ...

IEEE1996