Area and space integrated light deficit of sunspot images

Details Area and space integrated light deficit of sunspot images Area and space integrated light deficit of sunspot images

Jul 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974pmi..rept.....t&link_type=abstract

Final Report, 1 Apr. 1973 - 30 Jun. 1974 Photometrics, Inc., Lexington, MA.

Computer Science

Optical Density, Solar Activity, Solar Flares, Sunspots, Computer Techniques, Imaging Techniques, Luminous Intensity, Mapping, Photointerpretation, Solar Radiation

Scientific paper

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 digital 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.

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