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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Stephen A. Burns
  • Vol. 26, Iss. 4 — Apr. 1, 2009
  • pp: 1055–1070

Recognition using information-optimal adaptive feature-specific imaging

Pawan K. Baheti and Mark A. Neifeld  »View Author Affiliations


JOSA A, Vol. 26, Issue 4, pp. 1055-1070 (2009)
http://dx.doi.org/10.1364/JOSAA.26.001055


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Abstract

We present an information-theoretic adaptive feature-specific imaging (AFSI) system for a M-class recognition task. The proposed system utilizes the recently developed task-specific information (TSI) framework to incorporate the knowledge from previous measurements and adapt the projection matrix at each step. The decision-making framework is based on sequential hypothesis testing. We quantify the number of measurements required to achieve a specified probability of misclassification ( P e ) , and we compare the performances of three approaches: the new TSI-based AFSI system, a previously reported statistical AFSI system, and static FSI (SFSI). The TSI-based AFSI system exhibits significant improvement compared with SFSI and statistical AFSI at low signal-to-noise ratio (SNR). It is shown that for M = 4 hypotheses, SNR = 20 dB and desired P e = 10 2 , TSI-based AFSI requires 3 times fewer measurements than statistical AFSI, and 16 times fewer measurements than SFSI. We also describe an extension of the proposed method that is suitable for recognition in the presence of nuisance parameters such as illumination conditions and target orientations.

© 2009 Optical Society of America

OCIS Codes
(110.1085) Imaging systems : Adaptive imaging
(110.1758) Imaging systems : Computational imaging
(110.3055) Imaging systems : Information theoretical analysis
(100.4995) Image processing : Pattern recognition, metrics

ToC Category:
Imaging Systems

History
Original Manuscript: September 8, 2008
Revised Manuscript: February 4, 2009
Manuscript Accepted: February 8, 2009
Published: March 31, 2009

Citation
Pawan K. Baheti and Mark A. Neifeld, "Recognition using information-optimal adaptive feature-specific imaging," J. Opt. Soc. Am. A 26, 1055-1070 (2009)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-26-4-1055

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