Abstract

Methods of computing impulse-response weights of 1- and 2-D matched filters and LMS filters for suppressing clutter in an electrooptic sensor’s output are developed and illustrated with examples. The methods are applicable to signals from scanning or staring sensors viewing point or extended sources against variable backgrounds, provided signal shape and orientation are known. The matched-filter design technique is based on isotropic power-spectral clutter models whose parameters also must be known. Images of sensor output are assumed to provide the requisite information about signals and backgrounds. The LMS design technique is based on deterministic polynomial clutter models. An LMS filter estimates signal amplitude explicitly and local clutter parameters implicitly by performing a least-squares fit of a signal-plus-clutter model to the sensor output at every point of the scene. Thus clutter parameters need not be known for LMS design, although qualitative knowledge of the background may facilitate choice of the clutter model.

© 1988 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Simulation of mid-infrared clutter rejection. 1: One-dimensional LMS spatial filter and adaptive threshold algorithms

M. S. Longmire, A. F. Milton, and E. H. Takken
Appl. Opt. 21(21) 3819-3833 (1982)

Simulation of mid-infrared clutter rejection. 2: Threshold-sensor-size effects with LMS-filtered noise

M. S. Longmire, F. D. Bryant, J. D. Wilkey, and A. F. Milton
Appl. Opt. 24(4) 579-589 (1985)

Least-mean-square spatial filter for IR sensors

E. H. Takken, D. Friedman, A. F. Milton, and R. Nitzberg
Appl. Opt. 18(24) 4210-4222 (1979)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (5)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (63)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription