Incomplete system models can cause image restoration failures

Stephen K. Park; Rajeeb Hazra

doi:10.1117/12.211996

16 June 1995 Incomplete system models can cause image restoration failures

Stephen K. Park, Rajeeb Hazra

Proceedings Volume 2488, Visual Information Processing IV; (1995) https://doi.org/10.1117/12.211996
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

It is unfortunate but true that incomplete imaging system models are commonly used for simulation-based image restoration studies. As an illustration of this, a common-but- incomplete continuous-input/continuous-output (c/c) system model is used in this paper to produce some simulated restorations. In this way, it is demonstrated that when image formation blur is the only significant source of image degradation, then conventional c/c model-based restoration can successfully sharpen blurred images, even when the blurring is excessive. If however, at least a small amount of additive random noise is also a source of image degradation (as is always the case in practice), then conventional c/c model-based restoration will produce satisfactory results, if at all, only if the restoration filter is consistent with a more comprehensive system model that accounts for the presence of this noise. Moreover, if sampling and reconstruction are part of the imaging process then conventional c/c model-based restoration can fail to produce satisfactory results; this is true even if there is no additive random noise. In this way, it is demonstrated that a c/c model is not a correct sampled imaging system model; instead a more comprehensive continuous-input/discrete- processing/continuous-output model should be used as the basis for simulation-based restoration studies.

Citation Download Citation

Stephen K. Park and Rajeeb Hazra "Incomplete system models can cause image restoration failures", Proc. SPIE 2488, Visual Information Processing IV, (16 June 1995); https://doi.org/10.1117/12.211996

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