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Volume: 27 | Article ID: art00059
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Measurement of CIELAB spatio-chromatic contrast sensitivity in different spatial and chromatic directions
Vlado Kitanovski
Alastair Reed
Kristyn Falkenstern
Marius Pedersen
  DOI :  10.2352/issn.2169-2629.2019.27.59  Published Online :  October 2019
Abstract

This paper presents data on CIELAB chromatic contrast sensitivity collected in a psychophysical experiment. To complement previously published data in the low-frequency range, we selected five spatial frequencies in the range from 2.4 to 19.1 cycles per degree (cpd). A Gabor stimulus was modulated along six chromatic directions in the a*-b* plane. We also investigated the impact on contrast sensitivity from spatial orientations – both vertically and diagonally oriented stimuli were used. The analysis of the collected data showed lowest contrast sensitivity in the chromatic direction of around 120° from the positive a*-axis. The contrast sensitivity in the diagonal spatial orientation is slightly lower when compared to the vertical orientation.

Journal Title : Color and Imaging Conference
Publisher Name : Society for Imaging Science and Technology
Subject Areas :
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 DOI 10.2352/issn.2169-2629.2019.27.59
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Vlado Kitanovski, Alastair Reed, Kristyn Falkenstern, Marius Pedersen, "Measurement of CIELAB spatio-chromatic contrast sensitivity in different spatial and chromatic directions"  in Proc. IS&T 27th Color and Imaging Conf.,  2019,  pp 326 - 330,  https://doi.org/10.2352/issn.2169-2629.2019.27.59

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Copyright © Society for Imaging Science and Technology 2019
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Color and Imaging Conference
color imaging conf
2166-9635
Society for Imaging Science and Technology
10.2352/issn.2169-2629.2019.27.59
2166-9635(20191021)2019:1L.326;1-
s59.phd
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Articles
Measurement of CIELAB spatio-chromatic contrast sensitivity in different spatial and chromatic directions
KitanovskiVlado
ReedAlastair
FalkensternKristyn
PedersenMarius
21102019
2019
1
326
330
2019
This paper presents data on CIELAB chromatic contrast sensitivity collected in a psychophysical experiment. To complement previously published data in the low-frequency range, we selected five spatial frequencies in the range from 2.4 to 19.1 cycles per degree (cpd). A Gabor stimulus was modulated along six chromatic directions in the a*-b* plane. We also investigated the impact on contrast sensitivity from spatial orientations – both vertically and diagonally oriented stimuli were used. The analysis of the collected data showed lowest contrast sensitivity in the chromatic direction of around 120° from the positive a*-axis. The contrast sensitivity in the diagonal spatial orientation is slightly lower when compared to the vertical orientation.