Estimation of linear observer templates in the presence of multi-peaked Gaussian noise through 2AFC experiments

Darrin C. Edwards, Matthew A Kupinski, Robert M. Nishikawa, Charles E. Metz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

We extend a method for linear template estimation developed by Abbey et al. which demonstrated that a linear observer template can be estimated effectively through a two-alternative forced choice (2AFC) experiment, assuming the noise in the images is Gaussian, or multivariate normal (MVN). We relax this assumption, allowing the noise in the images to be drawn from a weighted sum of MVN distributions, which we call a multi-peaked MVN (MPMVN) distribution. Our motivation is that more complicated probability density functions might be approximated in general by such MPMVN distributions. Our extension of Abbey et al.'s method requires us to impose the additional constraint that the covariance matrices of the component peaks of the signal-present noise distribution all be equal, and that the covariance matrices of the component peaks of the signal-absent noise distribution all be equal (but different in general from the signal-present covariance matrices). Preliminary research shows that our generalized method is capable of producing unbiased estimates of linear observer templates in the presence of MPMVN noise under the stated assumptions. We believe this extension represents a next step toward the general treatment of arbitrary image noise distributions.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages85-96
Number of pages12
Volume3981
StatePublished - 2000
Externally publishedYes
EventMedical Imaging 2000: Image Perception and Performance - San Diego, CA, USA
Duration: Feb 16 2000Feb 17 2000

Other

OtherMedical Imaging 2000: Image Perception and Performance
CitySan Diego, CA, USA
Period2/16/002/17/00

Fingerprint

random noise
Covariance matrix
templates
Experiments
Normal distribution
Probability density function
probability density functions
normal density functions
estimates

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Edwards, D. C., Kupinski, M. A., Nishikawa, R. M., & Metz, C. E. (2000). Estimation of linear observer templates in the presence of multi-peaked Gaussian noise through 2AFC experiments. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3981, pp. 85-96). Society of Photo-Optical Instrumentation Engineers.

Estimation of linear observer templates in the presence of multi-peaked Gaussian noise through 2AFC experiments. / Edwards, Darrin C.; Kupinski, Matthew A; Nishikawa, Robert M.; Metz, Charles E.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3981 Society of Photo-Optical Instrumentation Engineers, 2000. p. 85-96.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Edwards, DC, Kupinski, MA, Nishikawa, RM & Metz, CE 2000, Estimation of linear observer templates in the presence of multi-peaked Gaussian noise through 2AFC experiments. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 3981, Society of Photo-Optical Instrumentation Engineers, pp. 85-96, Medical Imaging 2000: Image Perception and Performance, San Diego, CA, USA, 2/16/00.
Edwards DC, Kupinski MA, Nishikawa RM, Metz CE. Estimation of linear observer templates in the presence of multi-peaked Gaussian noise through 2AFC experiments. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3981. Society of Photo-Optical Instrumentation Engineers. 2000. p. 85-96
Edwards, Darrin C. ; Kupinski, Matthew A ; Nishikawa, Robert M. ; Metz, Charles E. / Estimation of linear observer templates in the presence of multi-peaked Gaussian noise through 2AFC experiments. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3981 Society of Photo-Optical Instrumentation Engineers, 2000. pp. 85-96
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