Astronomical point-source detection based on nonlinear image filtering with partial differential equations

Details Astronomical point-source detection based on nonlinear image filtering with partial differential equations Astronomical point-source detection based on nonlinear image filtering with partial differential equations

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005spie.5913..669p&link_type=abstract

Signal and Data Processing of Small Targets 2005. Edited by Drummond, Oliver E. Proceedings of the SPIE, Volume 5913, pp. 669

Physics

2

Scientific paper

A new nonlinear diffusion filtering scheme based on a nonlinear diffusion equation with a variable scale parameter is developed to preserve faint point sources while smoothing images for segmentation purposes. Application of the proposed approach to simulated, as well as to real images obtained by the Spitzer Space Telescope and by the Chandra X-ray Observatory reduced the Gaussian and Poisson noise successfully, while preserving both point sources and diffuse structures.

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