Estimates of human-observer templates for a simple detection task in correlated noise

Craig K. Abbey; Miguel P. Eckstein

doi:10.1117/12.383092

14 April 2000 Estimates of human-observer templates for a simple detection task in correlated noise

Craig K. Abbey, Miguel P. Eckstein

Proceedings Volume 3981, Medical Imaging 2000: Image Perception and Performance; (2000) https://doi.org/10.1117/12.383092
Event: Medical Imaging 2000, 2000, San Diego, CA, United States

Abstract

An observer template encapsulates the relative weight assigned to each pixel by an observer performing a detection or discrimination task. In previous work, Abbey et Al. (Proc. SPIE 3663, 1999.) have developed a methodology for estimating human-observer templates in two-alternative forced-choice detection and classification experiments. The methodology assumes a linear observer, and is designed for use on images with noise that is Gaussian distributed. In this work, the methodology is used to evaluate human-observer templates for tasks in correlated Gaussian noise. We consider detection of a Gaussian 'bump' signal in image noise that has either lowpass or highpass correlation structures, as well as white- noise task for reference. The estimated templates show that the human observers are sensitive to the correlation structure of the noise (as expected). However, the human-observer templates do not appear to fully adapt to noise correlations as the ideal observer does.

Citation Download Citation

Craig K. Abbey and Miguel P. Eckstein "Estimates of human-observer templates for a simple detection task in correlated noise", Proc. SPIE 3981, Medical Imaging 2000: Image Perception and Performance, (14 April 2000); https://doi.org/10.1117/12.383092

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available