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The Effect of Gamma and Chroma on the Perception of Color Images
Judith Dijk
Piet W. Verbeek
Jan Walraven
Ian T. Young
  DOI :  10.2352/CGIV.2002.1.1.art00039  Published Online :  January 2002
Abstract

We present the results of experiments in which we manipulated color images in the CIELAB space by first applying a scaling factor on chroma (C*). After this we applied a gamma transformation (an exponent relating the input to the output) to the luminance (Y) in XYZ space, while keeping the chromaticity values (x, y) constant. The aim of the experiments was to test the subjective preference for a particular gamma and chroma scaling factor.Two natural images (standard ISO images) were transformed with 4 different values of gamma and 4 different scaling factors for chroma. The images were viewed on a CRT monitor.We found that the preference depends on the gamma, on the chroma scaling factor and on both variables combined. However, increasing or decreasing one or both variables does not improve the preference for the images that are used.The results were not significantly different for the two different images.

Journal Title : Conference on Colour in Graphics, Imaging, and Vision
Publisher Name : Society of Imaging Science and Technology
Publisher Location : 7003 Kilworth Lane, Springfield, VA 22151, USA
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 DOI 10.2352/CGIV.2002.1.1.art00039
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Judith Dijk, Piet W. Verbeek, Jan Walraven, Ian T. Young, "The Effect of Gamma and Chroma on the Perception of Color Images"  in Proc. IS&T CGIV 2002 First European Conf. on Colour in Graphics, Imaging, and Vision,  2002,  pp 175 - 180,  https://doi.org/10.2352/CGIV.2002.1.1.art00039

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Copyright © Society for Imaging Science and Technology 2002
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Conference on Colour in Graphics, Imaging, and Vision
conf colour graph imag vis
2158-6330
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA
2158-6330(20020101)2002:1L.175;1-
cgiv_v2002n1/splitsection39.xml
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Articles
The Effect of Gamma and Chroma on the Perception of Color Images
DijkJudith
VerbeekPiet W.
WalravenJan
YoungIan T.
01012002
2002
1
175
180
2002
We present the results of experiments in which we manipulated color images in the CIELAB space by first applying a scaling factor on chroma (C*). After this we applied a gamma transformation (an exponent relating the input to the output) to the luminance (Y) in XYZ space, while keeping the chromaticity values (x, y) constant. The aim of the experiments was to test the subjective preference for a particular gamma and chroma scaling factor.Two natural images (standard ISO images) were transformed with 4 different values of gamma and 4 different scaling factors for chroma. The images were viewed on a CRT monitor.We found that the preference depends on the gamma, on the chroma scaling factor and on both variables combined. However, increasing or decreasing one or both variables does not improve the preference for the images that are used.The results were not significantly different for the two different images.