Speckle Statistics In Synthetic Aperture Radar (SAR) Imagery With Correlated Looks

G V April; E. R. Harvey

doi:10.1117/12.948523

2 December 1988 Speckle Statistics In Synthetic Aperture Radar (SAR) Imagery With Correlated Looks

G V April, E. R. Harvey

Proceedings Volume 0976, Statistical Optics; (1988) https://doi.org/10.1117/12.948523
Event: 32nd Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1988, San Diego, CA, United States

Abstract

The high resolution in synthetic aperture radar (SAR) systems is reduced by the speckle appearing in the images. This speckle noise is generated by the coherent processing of radar signals and exists in all types of coherent imaging systems. We study the statistical properties of speckle noise in a four-look SEAS AT SAR image to show evidence of correlation between underlying looks resulting in correlated values for adjacent pixels in the final image. Concentrating on homogeneous areas of the image, experimental determination of the SNR and of the probability density of the recorded intensity is performed. It is shown that the intensity fluctuations due to speckle noise in homogeneous areas are not gamma distributed. A model incorporating the empirical correlation coefficient is extracted from experimental data.

Citation Download Citation

G V April and E. R. Harvey "Speckle Statistics In Synthetic Aperture Radar (SAR) Imagery With Correlated Looks", Proc. SPIE 0976, Statistical Optics, (2 December 1988); https://doi.org/10.1117/12.948523

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