Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Engineering the pupil phase to improve image quality

[+] Author Affiliations
Sudhakar Prasad

Univ. of New Mexico (USA)

Todd C. Torgersen, Victor P. Pauca, Robert J. Plemmons

Wake Forest Univ. (USA)

Joseph van der Gracht

HoloSpex, Inc. (USA)

Proc. SPIE 5108, Visual Information Processing XII, 1 (August 11, 2003); doi:10.1117/12.487572
Text Size: A A A
From Conference Volume 5108

  • Visual Information Processing XII
  • Zia-ur Rahman; Robert A. Schowengerdt; Stephen E. Reichenbach
  • Orlando, FL | April 21, 2003

abstract

By suitably phase-encoding optical images in the pupil plane and then digitally restoring them, one can greatly improve their quality. The use of a cubic phase mask originated by Dowski and Cathey to enhance the depth of focus in the images of 3-d scenes is a classic example of this powerful approach. By using the Strehl ratio as a measure of image quality, we propose tailoring the pupil phase profile by minimizing the sensitivity of the quality of the phase-encoded image of a point source to both its lateral and longitudinal coordinates. Our approach ensures that the encoded image will be formed under a nearly shift-invariant imaging condition, which can then be digitally restored to a high overall quality nearly free from the aberrations and limited depth of focus of a traditional imaging system. We also introduce an alternative measure of sensitivity that is based on the concept of Fisher information. In order to demonstrate the validity of our general approach, we present results of computer simulations that include the limitations imposed by detector noise.

© (2003) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Sudhakar Prasad ; Todd C. Torgersen ; Victor P. Pauca ; Robert J. Plemmons and Joseph van der Gracht
"Engineering the pupil phase to improve image quality", Proc. SPIE 5108, Visual Information Processing XII, 1 (August 11, 2003); doi:10.1117/12.487572; http://dx.doi.org/10.1117/12.487572


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement


  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.