Share Email Print

Proceedings Paper

Process perspective on image quality evaluation
Author(s): Tuomas Leisti; Raisa Halonen; Anna Kokkonen; Hanna Weckman; Marja Mettänen; Lasse Lensu; Risto Ritala; Pirkko Oittinen; Göte Nyman
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The psychological complexity of multivariate image quality evaluation makes it difficult to develop general image quality metrics. Quality evaluation includes several mental processes and ignoring these processes and the use of a few test images can lead to biased results. By using a qualitative/quantitative (Interpretation Based Quality, IBQ) methodology, we examined the process of pair-wise comparison in a setting, where the quality of the images printed by laser printer on different paper grades was evaluated. Test image consisted of a picture of a table covered with several objects. Three other images were also used, photographs of a woman, cityscape and countryside. In addition to the pair-wise comparisons, observers (N=10) were interviewed about the subjective quality attributes they used in making their quality decisions. An examination of the individual pair-wise comparisons revealed serious inconsistencies in observers' evaluations on the test image content, but not on other contexts. The qualitative analysis showed that this inconsistency was due to the observers' focus of attention. The lack of easily recognizable context in the test image may have contributed to this inconsistency. To obtain reliable knowledge of the effect of image context or attention on subjective image quality, a qualitative methodology is needed.

Paper Details

Date Published: 28 January 2008
PDF: 8 pages
Proc. SPIE 6808, Image Quality and System Performance V, 68080P (28 January 2008); doi: 10.1117/12.765438
Show Author Affiliations
Tuomas Leisti, Univ. of Helsinki (Finland)
Raisa Halonen, Helsinki Univ. of Technology (Finland)
Anna Kokkonen, Helsinki Univ. of Technology (Finland)
Hanna Weckman, Univ. of Helsinki (Finland)
Marja Mettänen, Tampere Univ. of Technology (Finland)
Lasse Lensu, Lappeenranta Univ. of Technology (Finland)
Risto Ritala, Tampere Univ. of Technology (Finland)
Pirkko Oittinen, Helsinki Univ. of Technology (Finland)
Göte Nyman, Univ. of Helsinki (Finland)

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

© SPIE. Terms of Use
Back to Top