DISTORTION CORRECTION PROCESSING SYSTEM FOR SATELLITE PICTURE

摘要

PURPOSE:To correct the high-frequency distortion (jitter) of a picture from a LANDSAT D satellite, etc., where the high-frequency distortion is generated at a high speed with high precision by considering processing for distortion correction in two-directional sampling. CONSTITUTION:An observation picture and track and attitude data are read out of a magnetic tape 31 and a distortion correction processing part 34 which employs two- directional sampling corrects the distortion of said data on the basis of a correction coefficient calculated from the picture and data through a radiometric distortion correction coefficient calculation part 32 and a geometric distortion correction coefficient calculation part 33, thereby storing the corrected data on a tape 35. The radiometric correction consists of absolute correction which calibrates the value of the output data on each detected amount by using the corrected data and relative correction which compensates sensitivity characteristics between detectors. when the geometric distortion correction coefficient is calculated, the amount of deviation is found from high-frequency attitude data for correcting jitter distortion due to high frequency attitude variation and distortion correction processing is performed in the two-directional sampling.