Estimation of Spectra from Speckled Images

1 September 1982

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Aerospace and Electronic Systems

Vol. AES-18 (5) , 675-681
https://doi.org/10.1109/taes.1982.309281

Abstract

The effect of coherent speckling on the spectra of images and other signals is investigated. A method for estimating the spectrum of the unspeckled image is developed, and the errors inherent in such an estimate are analyzed. It is found that the error decreases when number of looks, number of averaged spectra, and contrast increase, and when spectral width decreases.

Keywords

This publication has 8 references indexed in Scilit:

An adaptive filter for smoothing noisy radar images
Proceedings of the IEEE, 1981
SAR response to partially coherent phenomena
IEEE Transactions on Antennas and Propagation, 1980
Spaceborne Imaging Radar: Monitoring of Ocean Waves
Science, 1980
Image restoration by Wiener filtering in the presence of signal-dependent noise
Applied Optics, 1977
Optimum spatial filter for image restoration degraded by multiplicative noise
Optics Communications, 1976
Some fundamental properties of speckle*
Journal of the Optical Society of America, 1976
Image Processing In Signal-Dependent Noise
Optical Engineering, 1974
Image enhancement and multiplicative noise
Optics Communications, 1970