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

Victor P. Pauca; Robert J. Plemmons; Sudhakar Prasad; Todd C. Torgersen; Joseph van der Gracht

doi:10.1117/12.505309

24 December 2003 Integrated optical-digital approaches for enhancing image restoration and focus invariance

Victor P. Pauca, Robert J. Plemmons, Sudhakar Prasad, Todd C. Torgersen, Joseph van der Gracht

Proceedings Volume 5205, Advanced Signal Processing Algorithms, Architectures, and Implementations XIII; (2003) https://doi.org/10.1117/12.505309
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

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.

Citation Download Citation

Victor P. Pauca, Robert J. Plemmons, Sudhakar Prasad, Todd C. Torgersen, and Joseph van der Gracht "Integrated optical-digital approaches for enhancing image restoration and focus invariance", Proc. SPIE 5205, Advanced Signal Processing Algorithms, Architectures, and Implementations XIII, (24 December 2003); https://doi.org/10.1117/12.505309

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