A novel error metric for parametric fitting of point spread functions

Jonathan D. Simpkins; Robert L. Stevenson

doi:10.1117/12.2040602

17 February 2014 A novel error metric for parametric fitting of point spread functions

Jonathan D. Simpkins, Robert L. Stevenson

Proceedings Volume 9029, Visual Information Processing and Communication V; 90290A (2014) https://doi.org/10.1117/12.2040602
Event: IS&T/SPIE Electronic Imaging, 2014, San Francisco, California, United States

Abstract

Established work in the literature has demonstrated that with accurate knowledge of the corresponding blur kernel (or point spread function, PSF), an unblurred prior image can be reliably estimated from one or more blurred observations. It has also been demonstrated, however, that an incorrect PSF specification leads to inaccurate image restoration. In this paper, we present a novel metric which relates the discrepancy between a known PSF and a choice of approximate PSF, and the resulting effect that this discrepancy will have on the reconstruction of an unblurred image. Such a metric is essential to the accurate development and application of a parameterized PSF model.

Several error measures are proposed, which quantify the inaccuracy of image deblurring using a particular incorrect PSF. Using a set of simulation results, it is shown that the desired metric is feasible even without specification of the unblurred prior image or the radiometric response of the camera. It is also shown that the proposed metric accurately and reliably predicts the resulting deblurring error from the use of an approximate PSF in place of an exact PSF.

Citation Download Citation

Jonathan D. Simpkins and Robert L. Stevenson "A novel error metric for parametric fitting of point spread functions", Proc. SPIE 9029, Visual Information Processing and Communication V, 90290A (17 February 2014); https://doi.org/10.1117/12.2040602

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