Title :
Estimation of Spectra from Speckled Images
Author :
Goldfinger, Andrew D.
Author_Institution :
Applied Physics Laboratory, Johns Hopkins University, Johns Hopkins Road, Laurel, MD 20707
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 :
Adaptive filters; Fourier transforms; Frequency diversity; Image analysis; Interference; Nonlinear filters; Radar scattering; Signal processing; Signal resolution; Speckle;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
DOI :
10.1109/TAES.1982.309281
