Expansion of two-dimensional imaging apertures for resolution improvement in long-wavelength holography

Author

Abdel-Aal, R.E.

Author_Institution

King Fahd Univ. of Pet. & Miner., Dhahran, Saudi Arabia

Volume

137

Issue

3

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

157

Lastpage

162

Abstract

A method is described for improving resolution in long-wavelength holography by expanding the two-dimensional hologram aperture. Simulation results are presented to illustrate resolution improvements obtained when doubling the linear size of square apertures for imaging single-point, multiple-point and quasi-continuous objects in the presence of noise. A technique for improving the quality of images reconstructed from predicted holograms using a number of focus measures is described. Alternative strategies for reconstructing the two-dimensional holograms are discussed and their performance compared regarding prediction errors and noise. Data is supplied on CPU time usage for hologram expansion and reconstruction on a VAX-11/785 computer.<>

Keywords

acoustic holography; computer-generated holography; computerised pattern recognition; microwave holography; 2D hologram aperture; CPU time usage; acoustic holography; focus measures; hologram expansion; image quality improvement; long-wavelength holography; microwave holography; multiple-point objects; noise; predicted holograms; prediction errors; quasi-continuous objects; resolution improvement; single-point objects; square aperture linear size doubling; two-dimensional imaging apertures;

fLanguage

English

Journal_Title

Communications, Speech and Vision, IEE Proceedings I

Publisher

iet

ISSN

0956-3776

Type

jour

Filename

218063