Improved Astronomical Image Reproducing Techniques

Details Improved Astronomical Image Reproducing Techniques Improved Astronomical Image Reproducing Techniques

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pkas....8..105j&link_type=abstract

Publications of the Korean Astronomical Society, vol.8, no.1, p.105-117

Astronomy and Astrophysics

Astronomy

Scientific paper

Astronomical plates have a very large density range(dynamical range). Many exposed astronomical photographic plates do not provide detailed structures for very high densities, and some include hidden images for very low densities. The former can be fixed through 'Unsharp Masking' technique and the latter through 'Image Amplification' technique. Besides, we can find intrinsic colors of celestial bodies through 'Tri Color Composition' technique. Images of several plates which were observed from Sobaek Observatory with 61cm telescope are reproduced by the three kinds of image reproducing techniques. As reproduced image examples, we display an Orion nebula and a waxing crescent moon images through unsharp masking technique and an M81 image through image amplification technique. An Orion nebula and a Dumbbell nebula images are also given as results of tri color composition technique.

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