Map-Matching Technique For Synthetic Aperture Radar Images

Edwin R. Hiller

doi:10.1117/12.957505

4 September 1979 Map-Matching Technique For Synthetic Aperture Radar Images

Edwin R. Hiller

Proceedings Volume 0186, Digital Processing of Aerial Images; (1979) https://doi.org/10.1117/12.957505
Event: 1979 Huntsville Technical Symposium, 1979, Huntsville, United States

Abstract

Synthetic aperture radar (SAR) images obtained in real time on a moving vehicle can provide a means for obtaining fix data for the vehicle navigation system. Reference features are located in the SAR images through the use of map matching techniques, with each match providing a measurement of range and range rate to a known reference point. Three matches or fixes made in different directions can provide data for a complete position and velocity determination. A map matching technique has been developed for use with SAR images that utilizes a reference tem-plate that encodes only the shape (and not the difficult-to-predict image intensity levels) of the selected reference feature. Through an adaptive and localized normalization of the sensed image pixel amplitudes a matching metric is computed that is a strong function of the degree of shape match of the sensed image and the reference template but is only weakly dependent on the image intensity and contrast. This results in the reference feature being acquired and located with high probability even in the presence of competing features with possibly higher contrast. The map matching algorithm is described and results of theoretical analysis of its performance charac-teristics are presented with specific attention given to the effects of scene scintillation or speckle in the sensed imagery. The algorithm has been used on a large data base of SAR imagery with good success. Several examples are included to indicate typical performance for both urban and rural environments.

Citation Download Citation

Edwin R. Hiller "Map-Matching Technique For Synthetic Aperture Radar Images", Proc. SPIE 0186, Digital Processing of Aerial Images, (4 September 1979); https://doi.org/10.1117/12.957505

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
9 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Binary data

Synthetic aperture radar

Radar

Bridges

Stereolithography

Navigation systems

Digital signal processing

Show All Keywords

Keywords/Phrases

Search In:

Publication Years