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Intensity Scale Sensitometer, Swaminathan Kalyanam
Distinguishable Density Levels In Image Recording Of Earth Resources Satellite Data, Steven Beiser
Distinguishable Density Levels In Image Recording Of Earth Resources Satellite Data, Steven Beiser
Theses
The Earth Resources Technology Satellite (ERTS) system produces a large volume of images of the Earth, with exposed film as the final output. These Images are presented to the user in pictorial form for interpretation and analysis. Specifications for this output film include MTF requirements, development method requirements, geometric tolerance and the number of DDL's (distinguishable density levels). Given the specification of 64 levels of gray, with a minimum density range of 2.0, the following investigation is warranted. Using theoretical calculations, granularity will be determined at different density levels. Assuming that Selwyn's Law is valid for the range of apertures …