Interactive Digital Image Processing for Terrain Data Extraction.
Final technical rept. Nov 83-Sep 84 on Phase 5,
GENERAL ELECTRIC CO LANHAM MD SPACE SYSTEMS DIV
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Some techniques were investigated for extracting terrain surface roughness data from digital aerial imagery. Measurement of tonal changes in the imagery is one feasible approach. A digital image data base was assembled containing 10 image planes, 4096 x 4096 pixelsplane, 8 bitspixel. The planes contain Landsat Thematic Mapper image data, four digitized aerial photos which were rectified, registered to the Thematic Mapper image and mosaicked, and digitized aerial radar imagery, all for the same scene. From the digital photomosaic, open water and forested areas were extracted using a gray level-texture classification.