Effect of ink spreading and ink amount on the accuracy of the Yule-Nielsen modified spectral Neugebauer model

Radovan Slavuj; Ludovic G. Coppel; Jon Yngve Hardeberg

doi:10.1117/12.2083366

8 February 2015 Effect of ink spreading and ink amount on the accuracy of the Yule-Nielsen modified spectral Neugebauer model

Radovan Slavuj, Ludovic G. Coppel, Jon Yngve Hardeberg

Author Affiliations +

Proceedings Volume 9395, Color Imaging XX: Displaying, Processing, Hardcopy, and Applications; 93950E (2015) https://doi.org/10.1117/12.2083366
Event: SPIE/IS&T Electronic Imaging, 2015, San Francisco, California, United States

Abstract

To control printers so that the mixture of inks results in specific color under defined visual environment requires a spectral reflectance model that estimates reflectance spectra from nominal dot coverage. The topic of this paper is to investigate the dependence of the Yule-Nielsen modified spectral Neugebauer (YNSN) model accuracy on ink amount. It is shown that the performance of the YNSN model strongly depends on the maximum ink amount applied. In a cellular implementation, this limitation mainly occurs for high coverage prints, which impacts on the optimal cell design. Effective coverages derived from both Murray-Davis (MD) and YNSN show large ink spreading. As ink-jet printing is a non-impact printing process, the ink volume deposited per unit area (pixel) is constant, leading to the hypothesis that isolated ink dots have lower thickness that the full-tone ink film. Measured spectral reflectance curves show similar trend, which supports the hypothesis. The reduced accuracy of YNSN can thus be explained with the fact that patches with lower effective coverage have a mean ink thickness very different from that of the full-tone patch. The effect will be stronger for small dot coverage and large dot gain and could partially explain why the Yule-Nielsen n-factor is different for different inks. The performance of the YNSN model could be improved with integration of ink thickness variation.

Citation Download Citation

Radovan Slavuj, Ludovic G. Coppel, and Jon Yngve Hardeberg "Effect of ink spreading and ink amount on the accuracy of the Yule-Nielsen modified spectral Neugebauer model", Proc. SPIE 9395, Color Imaging XX: Displaying, Processing, Hardcopy, and Applications, 93950E (8 February 2015); https://doi.org/10.1117/12.2083366

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available