Speckle Reduction in SAR Imagery by Various Multi-Look Techniques

Abstract

SAR images are contaminated by speckle noise. Multi-look imaging is used for its alleviation. In this report, we discuss the performance of several techniques to generate multi-look images. It is shown that the geometric resolution of the impulse response can be traded for the radiometric resolution. The various techniques differ in the use of single looks, number, size and weighting function. It is found that by properly positioning of overlapping looks in the spectral domain, the equivalent number of looks is substantially higher than the number of independent looks.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1998
Accession Number
ADA349197

Entities

People

  • F. P. De Vries

Organizations

  • Netherlands Organisation for Applied Scientific Research

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Bandwidth
  • Classification
  • Coefficients
  • Computer Simulations
  • Data Science
  • Electronics Laboratories
  • Information Science
  • Intensity
  • Netherlands
  • Probability
  • Probability Density Functions
  • Random Variables
  • Sidelobes
  • Signal Processing
  • Statistics
  • Synthetic Aperture Radar
  • Weighting Functions

Readers

  • Image Processing and Computer Vision.
  • Systems Analysis and Design