Automated objective minimum resolvable temperature difference

Charles S. Bendall

doi:10.1117/12.391788

17 July 2000 Automated objective minimum resolvable temperature difference

Charles S. Bendall

Proceedings Volume 4030, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XI; (2000) https://doi.org/10.1117/12.391788
Event: AeroSense 2000, 2000, Orlando, FL, United States

Abstract

The Automated Objective Minimum Resolvable Temperature Difference (AO-MRTD) is an approach to provide an automated and objective measure of a thermal imager's performance. The algorithm is intended to provide a more accurate, reliable and cost effective figure of merit than traditional subjective MRTD measurements. MRTD values are calculated using signal-to-noise ratios obtained by match filtering digitized images of low contrast four bar patterns. Match filters are constructed from a high contrast image of the four bar patterns and the algorithm can assess sensor performance beyond Nyquist (similar to the minimum temperature difference perceived figure of merit). The MRTD values derived by the algorithm do not represent the minimum temperature differences perceived by human observers; however, simple modifications to the threshold signal-to- noise ratio result in human-like MRTD values. The algorithm has the flexibility to construct multiple types of match filters derived from a single high contrast image. Currently, the algorithm derives separate MRTD values for match filters corresponding to the bar pattern and it's derivative. Preliminary results suggest that a combination of the two match filters may yield a match to the human subjective MRTD results. The basic construction and operation of the algorithm is outlined.

Citation Download Citation

Charles S. Bendall "Automated objective minimum resolvable temperature difference", Proc. SPIE 4030, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XI, (17 July 2000); https://doi.org/10.1117/12.391788

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