Simplified measurement of point spread functions of hyperspectral cameras for assessment of spatial coregistration

Torbjørn Skauli; Hans Erling Torkildsen

doi:10.1117/12.2520219

14 May 2019 Simplified measurement of point spread functions of hyperspectral cameras for assessment of spatial coregistration

Torbjørn Skauli, Hans Erling Torkildsen

Author Affiliations +

Proceedings Volume 10986, Algorithms, Technologies, and Applications for Multispectral and Hyperspectral Imagery XXV; 109860E (2019) https://doi.org/10.1117/12.2520219
Event: SPIE Defense + Commercial Sensing, 2019, Baltimore, MD, United States

Abstract

In multi- and hyperspectral imaging, spatial coregistration of the point spread functions (PSFs) of all bands within each pixel is critical for the integrity of measured spectra. There is a need to define a standardized method for characterizing coregistration error. We propose a method that estimates PSFs from the product of line spread functions (LSFs) recorded in two orthogonal directions. Coregistration is then evaluated according to the PSF difference metric [T. Skauli, Opt. Expr. vol. 20, p. 918 (2012)]. Experimental results on two pushbroom hyperspectral cameras show good correspondence with measurements based on the full PSF, provided that LSF scan directions are aligned with axes of symmetry in the optics. Even a maximally unfavourable choice of scan directions gives meaningful estimates of coregistration error. The proposed method may have potential as a standard for coregistration characterization.

Conference Presentation

Citation Download Citation

Torbjørn Skauli and Hans Erling Torkildsen "Simplified measurement of point spread functions of hyperspectral cameras for assessment of spatial coregistration", Proc. SPIE 10986, Algorithms, Technologies, and Applications for Multispectral and Hyperspectral Imagery XXV, 109860E (14 May 2019); https://doi.org/10.1117/12.2520219

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