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21 November 1980 Automated System Of Photographic Photometry
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Proceedings Volume 0264, Applications of Digital Image Processing to Astronomy; (1980)
Event: 1981 Los Angeles Technical Symposium, 1980, Los Angeles, United States
We present a digitized Stellar Photometry Automated (SPA) system capable of treating large amounts of information with little intervention from the astronomer. SPA automatically finds stellar objects, performs a cross correlation of all centers in all plates and applies an algorithm to derive a magnitude. Different magnitude algorithms are used such as analytical and numerical integration of the individual stellar arrays. Because of the linearization and the background-subtraction capability the results are of better quality then in conventional analogical techniques i.e. iris photometry, and can be moderately extrapolated. Data selection can be performed with the aid of a quality index. Techniques used in SPA are graphically illustrated and applications as well as future developments are briefly described.
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Claude Rheault and Eduardo Hardy "Automated System Of Photographic Photometry", Proc. SPIE 0264, Applications of Digital Image Processing to Astronomy, (21 November 1980);

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