Area and Space Integrated Light Deficit of Sunspot Images

Microdensitometric film reduction, analysis and display techniques, and digital computer analysis and display were applied to solar surface radiance data. Photographs of sunspot activity were converted to isophote contour maps and ditital optical density arrays recorded on magnetic tape. Edge discri...

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Bibliographic Details
Main Authors: Trowbridge,Christian A, Miller,Carlton S
Format: Report
Language:English
Subjects:
Astrophysics
Computer Programming and Software
COMPUTER PROGRAMS
CONTOURS
FORTRAN
IMAGE PROCESSING
MAPPING(TRANSFORMATIONS)
SOLAR ACTIVITY
SOLAR FLARES
SUNSPOTS
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Summary:Microdensitometric film reduction, analysis and display techniques, and digital computer analysis and display were applied to solar surface radiance data. Photographs of sunspot activity were converted to isophote contour maps and ditital optical density arrays recorded on magnetic tape. Edge discrimination and background-correction procedures were developed to semi-automatically determine sunspot area and integrated light deficit from these digital data. Sample results of the methods developed are given.