29 January 2007 Deducing ink-transmittance spectra from reflectance and transmittance measurements of prints
Author Affiliations +
Proceedings Volume 6493, Color Imaging XII: Processing, Hardcopy, and Applications; 649314 (2007); doi: 10.1117/12.705951
Event: Electronic Imaging 2007, 2007, San Jose, CA, United States
Abstract
The color of prints is mainly determined by the light absorption of the inks deposited on top of paper. In order to predict the reflectance spectrum of prints, we use a spectral prediction model in which each ink is characterized by its spectral transmittance. In the present paper, we consider two classical reflectance prediction models: the Clapper-Yule model and the Williams-Clapper model. They rely on a same description of multiple reflection-transmission of light, but use a different description of the attenuation of light by the inks. In the Clapper-Yule model (non-orientational ink attenuation), the orientation of light traversing the ink is not taken into account. In the Williams-Clapper model, it is taken into account (orientational ink attenuation). In order to determine experimentally which of these two models is the more suitable for a given type of print, we propose a method using the reflectance and the transmittance of prints. We introduce a bimodal model, enabling spectral reflectance and transmittance predictions. Depending whether the direction of light into the ink is taken into account, we obtain a non-orientational bimodal model or an orientational bimodal model. Using these two models, we deduce the ink transmittance spectrum from various reflectance and transmittance measurements performed on a same print, and compare the different deduced spectra. The model which is the most adapted to the considered print is the one where the deduced spectra best match each other.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mathieu Hébert, Roger D. Hersch, "Deducing ink-transmittance spectra from reflectance and transmittance measurements of prints", Proc. SPIE 6493, Color Imaging XII: Processing, Hardcopy, and Applications, 649314 (29 January 2007); doi: 10.1117/12.705951; https://doi.org/10.1117/12.705951
PROCEEDINGS
13 PAGES


SHARE
Back to Top