Non-uniformity correction mitigating the effect of lens temperature

Charles C. Kim; Elisabeth Correa

doi:10.1117/12.2299519

26 April 2018 Non-uniformity correction mitigating the effect of lens temperature

Charles C. Kim, Elisabeth Correa

Proceedings Volume 10625, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXIX; 106250G (2018) https://doi.org/10.1117/12.2299519
Event: SPIE Defense + Security, 2018, Orlando, FL, United States

Abstract

Non-uniformity correction (NUC) is a standard procedure for infrared (IR) cameras. The effect of lens temperature, however, is often ignored during the implementation of a NUC. Ignoring the effect of temperature is acceptable if the lens temperature is at much lower than ambient temperature, whose irradiance onto the focal plane array (FPA) is much less than that of the scene. Ignoring the effect of temperature is also acceptable if the lens temperature during the calibration for NUC is the same as that during the scene collection. The change of the lens temperature in between the calibration for NUC and the scene collection, however, affects the performance. Such degradation in image quality is presented by the frames taken by a mid-wave infrared (MWIR) camera. An empirical law is established to mitigate the effect of lens temperature, which offers various options for NUC. As an example, we propose a four-point NUC that mitigates the effect of the lens temperature. We demonstrate its usefulness by applying it to the frames taken at various lens temperatures. The results are satisfactory.

Conference Presentation

Citation Download Citation

Charles C. Kim and Elisabeth Correa "Non-uniformity correction mitigating the effect of lens temperature", Proc. SPIE 10625, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXIX, 106250G (26 April 2018); https://doi.org/10.1117/12.2299519

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