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Free-response operator characteristic models for visual search

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T P Hutchinson

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LETTER TO THE EDITOR

When a person or an algorithm searches for targets throughout an image, there are no discrete trials, and the probability of a false alarm cannot be computed. Instead, what is observable is the rate of production of false alarms (per image, say), and data analysis uses the free-response version of signal detection theory. A previously-proposed model implies a power relationship for the free-response operating characteristic. The present letter introduces an extra parameter. The relationship between the logarithms of probability of correct detection and rate of false alarm production is no longer forced to be linear.


PACS

89.40.Bb Land transportation

07.05.Pj Image processing

02.50.Cw Probability theory

Subjects

Computational physics

Instrumentation and measurement

Environmental and Earth science

Dates

Issue 10 (21 May 2007)

Received 6 September 2007, in final form 10 April 2007

Published 30 April 2007



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