Image restoration using a row action projection method with adaptive smoothing

Sumitro Samaddar; Richard J. Mammone

doi:10.1117/12.190445

1 April 1995 Image restoration using a row action projection method with adaptive smoothing

Sumitro Samaddar, Richard J. Mammone

Author Affiliations +

Optical Engineering, Vol. 34, Issue 4, (April 1995). https://doi.org/10.1117/12.190445

Abstract

We present a spatially and temporally adaptive iterative image restoration algorithm. It extends an earlier technique using row action projection (RAP) by continuously varying spatial adaptation for applying updates and smoothing instead of the earlier segmentation based approach. The new algorithm is a subset of the method of projection onto convex sets and incorporates any a priori information about the blurred image or the blur in order to reduce ambiguity in the solution and accelerate the speed of convergence. Our algorithm generalizes the projection concept to column action projection (CAP). In RAP, an error in the estimate of a pixel of the blurred image is used to update all those pixels of the restored image that contribute to it. In CAP, a pixel of the restored image is updated using the errors in the estimates of all those pixels of the blurred image that receive contributions from that pixel. This algorithm adds a way of emphasizing high-SNR regions during restoration, reducing edge blurs by using a new edge-oriented smoothing, morphologically processing the local variance of the restored image, and temporally varying the restoration parameters to provide significantly better SNR improvements during restoration.

Citation Download Citation

Sumitro Samaddar and Richard J. Mammone "Image restoration using a row action projection method with adaptive smoothing," Optical Engineering 34(4), (1 April 1995). https://doi.org/10.1117/12.190445

Published: 1 April 1995

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