A linear filter for resolution of point sources

W. Keith Maples

doi:10.1117/12.2321754

1 October 1990 A linear filter for resolution of point sources

W. Keith Maples

Proceedings Volume 1305, Signal and Data Processing of Small Targets 1990; (1990) https://doi.org/10.1117/12.2321754
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

Abstract

Linear, finite-impulse-response (FIR) filters are efficient for detecting point sources in data generated by a scanning detector array. In particular, matched filters have been widely used for detection and initial estimation of isolated sources. When separate sources have overlapping signals the matched filter does not work as well. Others have applied deconvolution filters to this case and shown good performance with high signal-to-noise ratios (SNR). The deconvolution filter is examined here in the context of general FIR filters. The novel aspect of this paper is the definition and application of an optimality concept for resolving arbitrary numbers of sources. A "resolution" attribute is defined which measures the difference between filter peak response and minimum response between adjacent peaks. A "max_min" filter is derived which has maximal resolution for given requirements on SNR and source separation distance. Its performance is compared with that of deconvolution.

Citation Download Citation

W. Keith Maples "A linear filter for resolution of point sources", Proc. SPIE 1305, Signal and Data Processing of Small Targets 1990, (1 October 1990); https://doi.org/10.1117/12.2321754

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Sensors

Deconvolution

Electronic filtering

Signal processing

Signal to noise ratio

Optical filters

Filtering (signal processing)

Show All Keywords

Keywords/Phrases

Search In:

Publication Years