Syntactic approach to the segmentation and classification of morphological features of galaxies

Details Syntactic approach to the segmentation and classification of morphological features of galaxies Syntactic approach to the segmentation and classification of morphological features of galaxies

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1657..535a&link_type=abstract

Proc. SPIE Vol. 1657, p. 535-545, Image Processing Algorithms and Techniques III, James R. Sullivan; Benjamin M. Dawson; Majid R

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Scientific paper

Most of the information related to the morphology of galaxies relies on the presence, shape and texture of patterns such as bars, rings, and spiral arms. Automatic classification of astronomical images requires therefore that objects represented in the image are indexed by the recognition of such morphological structures. We describe a methodology to segment well- known images of galaxies in their morphological features in an automated fashion. The detection, description and classification of these features is achieved through the use of attributed rewriting systems that allow the identification of structures according to rules formalizing the interpretation strategy followed by astronomers in the visual classification of galaxies. A priori knowledge about the physical characteristics of the objects in the image, as well as the image acquisition process controls the interpretation activity of the automated system allowing the design of flexible algorithms that can be tailored to a wide range of images differing in resolution, noise characteristics, and object orientation. Some results obtained applying the system to CCD images of spiral galaxies are presented.

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