Measurement of the earth resources technology satellite /ERTS-1/ multi-spectral scanner OTF from operational imageryThe optical transfer function (OTF) of some typical ERTS-1 multispectral imagery was obtained by comparison of matched sets of aircraft underflight and ERTS photographic and digital images. One-dimensional OTF analysis consisted in obtaining U-2 and ERTS microdensitometer scans followed by density to transmission conversion, microdensitometer aperture correction, exposure calibration, scan correlation scale optimization, OTF calculation, obtaining a form weighted average of the OTFs, transformation of the OTFs back to the spatial domain (giving the line spread function or LSF), and application of a window function to the LSF resulting in a smoothed OTF. Date-to-date comparison of ERTS OTFs showed a drop in quality on April 4, 1973, compared with January 4, 1973.
Document ID
19750039416
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Schowengerdt, R. A.
Antos, R. L.
Slater, P. N. (Arizona, University Tucson, Ariz., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1974
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Image assessment and specification; Seminar-in-Depth