Sub-image data processing in Astro-WISE

Details Sub-image data processing in Astro-WISE Sub-image data processing in Astro-WISE

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012exa...tmp...18m&link_type=abstract

Experimental Astronomy, Online First

Astronomy and Astrophysics

Astronomy

Data Lineage, Provenance, Astro-Wise, Sub-Image Processing

Scientific paper

Most often, astronomers are interested in a source (e.g., moving, variable, or extreme in some colour index) that lies on a few pixels of an image. However, the classical approach in astronomical data processing is the processing of the entire image or set of images even when the sole source of interest may exist on only a few pixels of one or a few images. This is because pipelines have been written and designed for instruments with fixed detector properties (e.g., image size, calibration frames, overscan regions, etc.). Furthermore, all metadata and processing parameters are based on an instrument or a detector. Accordingly, out of many thousands of images for a survey, this can lead to unnecessary processing of data that is both time-consuming and wasteful. We describe the architecture and an implementation of sub-image processing in Astro-WISE. The architecture enables a user to select, retrieve and process only the relevant pixels in an image where the source exists. We show that lineage data collected during the processing and analysis of datasets can be reused to perform selective reprocessing (at sub-image level) on datasets while the remainder of the dataset is untouched, a difficult process to automate without lineage.

Affiliated with

Also associated with

No associations

Rating

Sub-image data processing in Astro-WISE does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Sub-image data processing in Astro-WISE, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sub-image data processing in Astro-WISE will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1558789