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Proceedings Paper

Does sharpness affect the reproduction of color images?
Author(s): Samira Bouzit; Lindsay William MacDonald
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Paper Abstract

A psychophysical experiment was conducted to investigate the relationship between sharpness and preferred color of images displayed on a CRT monitor screen. Blurred versions of each of four original images were generated by convolution with a low-pass Gaussian filter. Sharpened versions of these images were created through adjustment of the image power spectrum. Each test image was decomposed into a set of spatial frequency bands, defined as octaves of the pixel sampling frequency. The Fourier power spectrum was derived, then amplitudes of selected bands were adjusted to enhance the desired spatial frequencies. The experimental results indicated that: (1) sharpness was perceived to be increased when certain spatial frequency bands were enhanced; (2) weighting the frequency bands using the standard observer's contrast sensitivity function (CSF) gives better results for particular distances; and (3) preferred image color is strongly related to image sharpness.

Paper Details

Date Published: 6 June 2002
PDF: 4 pages
Proc. SPIE 4421, 9th Congress of the International Colour Association, (6 June 2002); doi: 10.1117/12.464676
Show Author Affiliations
Samira Bouzit, Univ. of Derby (United Kingdom)
Lindsay William MacDonald, Univ. of Derby (United Kingdom)

Published in SPIE Proceedings Vol. 4421:
9th Congress of the International Colour Association
Robert Chung; Allan Rodrigues, Editor(s)

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