Geometric Speckle Reduction.
Thomas R. Crimmins · 1986
The presence of speckle in imagery produced with coherent illumination (e.g., synthetic aperture radar) reduces the detectability of objects in the images. It also reduces the effectiveness of some computer algorithms (e.g., edge detection) designed for automatic image analysis. Thus it is desirable to reduce speckle in synthetic aperture radar (SAR) images both to assist radar image interpreters and to preprocess images for automatic recognition algorithms on computers. The goal is to smooth out the speckle but at the same time preserve features of interest like edges, strong returns, etc.