THE AUTOMATIC DISCOR-SYSTEM FOR RECTIFICATION OF SPACE-BORNE IMAGERY AS A BASIS FOR MAP PRODUCTION

摘要

Due to their improved radiometric and geometric resolution the new generation of space-borne imagery (e.g. Landsat-4, SPOT, MOMS, Metric Camera) will become more and more important for map production and revision. For this purpose the multisensoral images have to be rectified on a common geometric basis. This basis can be an existing map or a rectified reference image (e.g. orthophoto). The paper describes the Digital Software Correlator for Image Rectification DISCOR. The system allows picture pre-processing. choice of different correlation and rectification functions, threshold correlation, variable window size. iterative and subimage rectification. The process can be controlled by user interaction or automatic procedures. The paper presents status and possibilities of the DISCOR-system and gives some examples of multisensor image production (e.g. LANDSAT-SEASAT-frame camera).