Back to articles
Articles
Volume: 23 | Article ID: art00086_1
Image
The Effects of Color on Gloss Appearance and Measurement
Susan Farnand
Ling Ye
  DOI :  10.2352/ISSN.2169-4451.2007.23.1.art00086_1  Published Online :  January 2007
Abstract

Experimentation was conducted to examine the performance of two instruments in predicting the perceptual gloss levels of patches of various colors. To explore this question, the ISO/IEC 19799 Differential Gloss Test chart was printed on a variety of substrates using a variety of inks on several printers. These printing combinations spanned a significant range of apparent gloss levels. The cyan, magenta, yellow, and black patches off the test targets were measured using both a traditional glossmeter and a μ-goniophotometric device developed at the Rochester Institute of Technology. This device, previously described in detail in the literature, measures specular reflection at all angles, not just the one equal and opposite angle to the light source as is done with a traditional glossmeter, creating a curve or Bi-directional Reflectance Distribution Function (BRDF) for the sample measured. In addition, the device generates a series of these curves along the length of the captured gloss band of the sample, allowing a measure of the variability of the specular light, σ, to be calculated. Previous psychophysical experimentation indicated that the width of the peak of the BRDF curve was found to be an excellent predictor of the appearance of gloss for black patch samples when used in conjunction with the gloss variability. Additional characteristics of this curve such as the height of the peak and the total area under the peak may be useful in relating physical measurements of specular reflection to the appearance of gloss. Possible useful relationships between these elements of the BRDF feature vector and the gloss appearance for patches of varied colors were examined using data generated by a psychophysical experiment comprising an anchored scaling technique in which the patches are visually assessed with respect to two reference patches, one having low apparent gloss and one having a high level of apparent gloss. The performance of this device relative to that of a traditional glossmeter when measuring uniform color patches was examined.

Journal Title : NIP & Digital Fabrication Conference
Publisher Name : Society of Imaging Science and Technology
Publisher Location : 7003 Kilworth Lane, Springfield, VA 22151, USA
Subject Areas :
Views 19
Downloads 2
 DOI 10.2352/ISSN.2169-4451.2007.23.1.art00086_1
 articleview.views 19
 articleview.downloads 2
  Cite this article 

Susan Farnand, Ling Ye, "The Effects of Color on Gloss Appearance and Measurement"  in Proc. IS&T Int'l Conf. on Digital Printing Technologies and Digital Fabrication (NIP23),  2007,  pp 373 - 377,  https://doi.org/10.2352/ISSN.2169-4451.2007.23.1.art00086_1

 Copy citation
  Copyright statement 
Copyright © Society for Imaging Science and Technology 2007
72010410
NIP & Digital Fabrication Conference
nip digi fabric conf
2169-4451
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA
2169-4451(20070101)2007:1L.373;1-
nip_v2007n1/splitsection86.xml
/ist/nipdf/2007/00002007/00000001/art00086
Articles
The Effects of Color on Gloss Appearance and Measurement
FarnandSusan
YeLing
01012007
2007
1
373
377
2007
Experimentation was conducted to examine the performance of two instruments in predicting the perceptual gloss levels of patches of various colors. To explore this question, the ISO/IEC 19799 Differential Gloss Test chart was printed on a variety of substrates using a variety of inks on several printers. These printing combinations spanned a significant range of apparent gloss levels. The cyan, magenta, yellow, and black patches off the test targets were measured using both a traditional glossmeter and a μ-goniophotometric device developed at the Rochester Institute of Technology. This device, previously described in detail in the literature, measures specular reflection at all angles, not just the one equal and opposite angle to the light source as is done with a traditional glossmeter, creating a curve or Bi-directional Reflectance Distribution Function (BRDF) for the sample measured. In addition, the device generates a series of these curves along the length of the captured gloss band of the sample, allowing a measure of the variability of the specular light, σ, to be calculated. Previous psychophysical experimentation indicated that the width of the peak of the BRDF curve was found to be an excellent predictor of the appearance of gloss for black patch samples when used in conjunction with the gloss variability. Additional characteristics of this curve such as the height of the peak and the total area under the peak may be useful in relating physical measurements of specular reflection to the appearance of gloss. Possible useful relationships between these elements of the BRDF feature vector and the gloss appearance for patches of varied colors were examined using data generated by a psychophysical experiment comprising an anchored scaling technique in which the patches are visually assessed with respect to two reference patches, one having low apparent gloss and one having a high level of apparent gloss. The performance of this device relative to that of a traditional glossmeter when measuring uniform color patches was examined.