title: Computer vision applications for coronagraphic optical alignment and image processing.
abstract: Modern coronagraphic systems require very precise alignment between optical components and can benefit greatly from automated image processing. We discuss three techniques commonly employed in the fields of computer vision and image analysis as applied to the Gemini Planet Imager, a new facility instrument for the Gemini South Observatory. We describe how feature extraction and clustering methods can be used to aid in automated system alignment tasks, and also present a search algorithm for finding regular features in science images used for calibration and data processing. Along with discussions of each technique, we present our specific implementation and show results of each one in operation.
authors.affiliation: Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA. savransky1@llnl.gov
authors.forename: Dmitry
authors.initials: D
authors.lastname: Savransky
authors.forename: Sandrine J
authors.initials: SJ
authors.lastname: Thomas
authors.forename: Lisa A
authors.initials: LA
authors.lastname: Poyneer
authors.forename: Bruce A
authors.initials: BA
authors.lastname: Macintosh