Restoration and enhancement of textural properties in SAR images using second-order statistics

Edmond Nezry; Hans-Guenther Kohl; Hugo De Groof

doi:10.1117/12.197531

21 December 1994 Restoration and enhancement of textural properties in SAR images using second-order statistics

Edmond Nezry, Hans-Guenther Kohl, Hugo De Groof

Proceedings Volume 2316, SAR Data Processing for Remote Sensing; (1994) https://doi.org/10.1117/12.197531
Event: Satellite Remote Sensing, 1994, Rome, Italy

Abstract

Local second order properties, describing spatial relations between pixels are introduced into the single-point speckle adaptive filtering processes, in order to account for the effects of speckle spatial correlation and to enhance scene textural properties in the restored image. To this end, texture measures originating, first from local grey level co-occurrence matrices (GLCM), and second from the local autocorrelation functions (ACF) are used. Results obtained on 3-look processed ERS-1 FDC and PRI spaceborne images illustrate the performance allowed by the introduction of these texture measures in the structure retaining speckle adaptive filters. The observable texture in remote sensing images is related to the physical spatial resolution of the sensor. For this reason, other spatial speckle decorrelation methods, more simple and easier to implement, for example post-filtering and linear image resampling, are also presented in this paper. In the particular case of spaceborne SAR imagery, all these methods lead to visually similar results. They produce filtered (radar reflectivity) images visually comparable to optical images.

Citation Download Citation

Edmond Nezry, Hans-Guenther Kohl, and Hugo De Groof "Restoration and enhancement of textural properties in SAR images using second-order statistics", Proc. SPIE 2316, SAR Data Processing for Remote Sensing, (21 December 1994); https://doi.org/10.1117/12.197531

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