INTERPOLATION AND SAMPLING IN SAR IMAGES

被引：15
|
作者：
QUEGAN, S
机构：
[1] Department of Applied, Computational Mathematics, University of Sheffield, Sheffield S10 2TN, UK
来源：
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 1990年 / 28卷 / 04期
关键词：
correlated exponential distributions; Image statistics; SAR autocorrelation; SAR texture;
D O I：
10.1109/TGRS.1990.572971
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The implications of interpolation and resampling for the statistics of Synthetic Aperture Radar (SAR) images are analyzed. Interpolation of the complex data conserves the statistical distribution and all moments if a condition involving the autocorrelation functions of the SAR and the interpolating filter is met; in the ideal case (uncorrelated samples) this reduces to the requirement that the interpolating filter has unit energy. Interpolation of the intensity data does not conserve the distribution. Expressions for Moments up to the fourth for an arbitrary interpolation scheme applied to correlated exponential data are derived and conditions for conservation of these moments displayed. Any finite resampling or interpolation scheme (other than nearest neighbor) will change the autocorrelation functions of the complex and intensity data and may introduce nonstationarity. © 1990 IEEE
引用
收藏
页码：641 / 646
页数：6
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