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Proceedings Paper

Internet-based assessment of image sharpness enhancement
Author(s): Lindsay MacDonald; Samira Bouzit
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Paper Abstract

Two internet-based psychophysical experiments were conducted to investigate the performance of an image sharpness enhancement method, based on adjustment of spatial frequencies in the image according to the contrast sensitivity function and compensation of MTF losses of the display. The method was compared with the widely-used unsharp mask (USM) filter from PhotoShop. The experiment was performed in two locations with different groups of observers: one in the UK, and the second in the USA. Three Apple LCD displays (15" studio, 23" HD cinema and 15" PowerBook) were used at both sites. Observers assessed the sharpness and pleasantness of the displayed images. Analysis of the results led to four major conclusions: (1) Performance of the sharpening methods; (2) Influence of MTF compensation; (3) Image dependency; and (4) Comparison between sharpness perception and preference judgement at both sites.

Paper Details

Date Published: 28 January 2008
PDF: 12 pages
Proc. SPIE 6808, Image Quality and System Performance V, 680812 (28 January 2008); doi: 10.1117/12.779141
Show Author Affiliations
Lindsay MacDonald, London College of Communication (United Kingdom)
Samira Bouzit, St. Andrew's Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 6808:
Image Quality and System Performance V
Susan P. Farnand; Frans Gaykema, Editor(s)

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