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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 3, Iss. 1 — Jan. 29, 2008

Analytical-form model observers for decompressed images

Dunling Li and Murray Loew  »View Author Affiliations

JOSA A, Vol. 24, Issue 12, pp. B188-B197 (2007)

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We report a method for evaluating the performance of model observers for decompressed images in analytical form using compression noise statistics. It derives test statistics and detectabilities for the ideal observer, the nonprewhitening observer, the Hotelling observer, and the channelized Hotelling observer (CHO) on decompressed images. The derived CHO performance is validated using the Joint Photographic Experts Group (JPEG) compression algorithm. The validation results show that the derived CHO receiver operating characteristics (ROCs) and areas under ROC curves predict accurately their corresponding estimated values. These analytical-form quality measures of decompressed images provide a way to optimize compression algorithms analytically, subject to a model-observer performance criterion. They also provide a theoretical foundation for efforts to create a model observer for decompressed images.

© 2007 Optical Society of America

OCIS Codes
(100.3010) Image processing : Image reconstruction techniques
(110.3000) Imaging systems : Image quality assessment
(110.4280) Imaging systems : Noise in imaging systems
(110.6980) Imaging systems : Transforms

Original Manuscript: March 5, 2007
Revised Manuscript: August 7, 2007
Manuscript Accepted: August 28, 2007
Published: November 12, 2007

Virtual Issues
Vol. 3, Iss. 1 Virtual Journal for Biomedical Optics

Dunling Li and Murray Loew, "Analytical-form model observers for decompressed images," J. Opt. Soc. Am. A 24, B188-B197 (2007)

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