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Proceedings Paper

Integrated optical-digital approaches for enhancing image restoration and focus invariance
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Paper Abstract

A novel and successful optical-digital approach for removing certain aberrations in imaging systems involves placing an optical mask between an image-recording device and an object to encode the wavefront phase before the image is recorded, followed by digital image deconvolution to decode the phase. We have observed that when appropriately engineered, such an optical mask can also act as a form of preconditioner for certain deconvolution algorithms. It can boost information in the signal before it is recorded well above the noise level, leveraging digital restorations of very high quality. In this paper, we 1) examine the influence that a phase mask has on the incoming signal and how it subsequently affects the performance of restoration algorithms, and 2) explore the design of optical masks, a difficult nonlinear optimization problem with multiple design parameters, for removing certain aberrations and for maximizing restorability and information in recorded images.

Paper Details

Date Published: 24 December 2003
PDF: 10 pages
Proc. SPIE 5205, Advanced Signal Processing Algorithms, Architectures, and Implementations XIII, (24 December 2003); doi: 10.1117/12.505309
Show Author Affiliations
Victor P. Pauca, Wake Forest Univ. (United States)
Robert J. Plemmons, Wake Forest Univ. (United States)
Sudhakar Prasad, Univ. of New Mexico (United States)
Todd C. Torgersen, Wake Forest Univ. (United States)
Joseph van der Gracht, HoloSpex, Inc. (United States)

Published in SPIE Proceedings Vol. 5205:
Advanced Signal Processing Algorithms, Architectures, and Implementations XIII
Franklin T. Luk, Editor(s)

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