Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/sas/8.0.0/doc/omdetect/node29.html
Дата изменения: Wed Oct 22 17:31:26 2008
Дата индексирования: Tue Aug 18 14:53:52 2009
Кодировка:
Поисковые слова: ngc 891
Background image XMM-Newton SAS Home Page
XMM-Newton Science Analysis System


omdetect (omdetect-5.14.2) [???]

Extended-source Validation Function Home Page Background algorithm Home Index

Meta Index / Home Page


Background image

The background image produced by omdetect is first constructed by using a median-smoothing algorithm that filters out bright pixels. When the sources have been found, the image is refined by masking-out source regions and interpolating across them. Since this is one of the slowest parts of omdetect various refinements have been made to the algorithm to make it run as fast as possible.


Subsections

XMM-Newton SOC/SSC -- 2008-10-22