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Image processing and data reduction of Apollo low light level photographsThe removal of the lens induced vignetting from a selected sample of the Apollo low light level photographs is discussed. The methods used were developed earlier. A study of the effect of noise on vignetting removal and the comparability of the Apollo 35mm Nikon lens vignetting was also undertaken. The vignetting removal was successful to about 10% photometry, and noise has a severe effect on the useful photometric output data. Separate vignetting functions must be used for different flights since the vignetting function varies from camera to camera in size and shape.
Document ID
19750021316
Document Type
Contractor Report (CR)
Authors
Alvord, G. C. (State Univ. of New York Albany, NY, United States)
Date Acquired
September 3, 2013
Publication Date
December 1, 1975
Subject Category
INSTRUMENTATION AND PHOTOGRAPHY
Report/Patent Number
NASA-CR-144659
Funding Number(s)
CONTRACT_GRANT: NAS5-20683
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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