Improved multiple look technique

Author

Yeo, T.S. ; Lay, W.L. ; Lu, Y.H. ; Ng, W.E. ; Lim, I. ; Zhang, C.B.

Author_Institution

Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore

Volume

1

fYear

1996

fDate

27-31 May 1996

Firstpage

57

Abstract

Synthetic aperture radar (SAR) images are contaminated by speckle noise. To suppress speckle, N lower resolution images (looks) are generated and averaged. This improves the signal-to-speckle noise ratio (SSNR) by a factor of √N, assuming that the corresponding pixels in these looks have equal mean intensities. In practice this assumption is not always valid and as such SSNR is degraded. A new adaptive technique that replaces the conventionally averaged resultant pixel with one of the N available pixels is found to produce better SSNR under these circumstances

Keywords

adaptive signal processing; geophysical signal processing; geophysical techniques; radar imaging; radar signal processing; remote sensing by radar; speckle; synthetic aperture radar; SAR image; adaptive signal processing; geophysical signal processing; land surface; lower resolution image; measurement technique; multiple look; radar imaging; radar remote sensing; signal to noise ratio; speckle noise suppression; synthetic aperture radar; terrain mapping; Image resolution; Image segmentation; Pixel; Radar imaging; Radar signal processing; Sampling methods; Signal processing; Signal resolution; Speckle; Synthetic aperture radar;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 1996. IGARSS '96. 'Remote Sensing for a Sustainable Future.', International

Conference_Location

Lincoln, NE

Print_ISBN

0-7803-3068-4

Type

conf

DOI

10.1109/IGARSS.1996.516243

Filename

516243