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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 23 — Aug. 10, 2000
  • pp: 4080–4097

All-digital ring–wedge detector applied to image quality assessment

David M. Berfanger and Nicholas George  »View Author Affiliations


Applied Optics, Vol. 39, Issue 23, pp. 4080-4097 (2000)
http://dx.doi.org/10.1364/AO.39.004080


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Abstract

In the automatic assessment of image quality we obtained a high accuracy in the classification of image degradations in a manner that is widely independent of scene content. Using an all-digital ring–wedge detector system combined with neural-network software, we conducted several experiments in which the end goal is to classify images according to numerical quality scales. Experiments are presented to stress the importance of both local and global image quality assessment. Two databases of degraded images were prepared. One uses five levels of Gaussian blur to simulate depth of field. The other was prepared with lossy compression and recovery with artifacts generated by a JPEG (Joint Photographic Experts Group) compression algorithm. In quantitative terms our best sorting of Gaussian blur without knowledge of the original scene was to an accuracy of 96%. For degradation using JPEG we obtained an accuracy of 95% without knowledge of the original and 98% when the original scene is available as a reference.

© 2000 Optical Society of America

OCIS Codes
(070.2590) Fourier optics and signal processing : ABCD transforms
(070.5010) Fourier optics and signal processing : Pattern recognition
(100.2000) Image processing : Digital image processing
(110.3000) Imaging systems : Image quality assessment
(200.4260) Optics in computing : Neural networks

History
Original Manuscript: August 16, 1999
Revised Manuscript: May 2, 2000
Published: August 10, 2000

Citation
David M. Berfanger and Nicholas George, "All-digital ring–wedge detector applied to image quality assessment," Appl. Opt. 39, 4080-4097 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-23-4080

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