Fusion of Digital Multispectral Videography With Interferometric Synthetic Aperture Radar

摘要

As new remote sensing systems possessing different spectral and spatial capabilities become available, the fusion of sensors utilizing different regions of the electromagnetic spectrum will accelerate. This paper describes the techniques used to merge interferometric synthetic aperture radar (IFSAR) with digital multispectral videography (DMSV). A thirty-five frame digital multispectral mosaic was constructed and merged with the Digital Elevation Model (DEM) and backscatter layers derived from an IFSAR airborne X-band radar system. Two methods were incorporated in an effort to utilize the combined DMSV-IFSAR data. First, a comparison was made between minimum distance classifications run using the DMSV data only, and with the DMSV combined with the IFSAR backscatter file. Results show that classification accuracies improved when separating trees from other green vegetation. Second, a simple cosine correction algorithm derived form the IFSAR DEM was used to radiometrically adjust the DMSV data for slope and aspect effects. The utility of this technique was not conclusive. However, a small test area consisting of a grass cover the appears to have been successfully modified.