https://pfspipe.ipmu.jp/jira This file is an XML representation of an issue en-us 8.3.4 803005 13-09-2019 https://pfspipe.ipmu.jp/jira/browse/INSTRM-1473 Instrument control development <p>The performance of sep (the wrapper for sextractor) produced some unexpect results during the engineering run, with very poor performance in some frames. This needs to be investigated further, and better input parameters determined. </p> INSTRM-1473

Investigate performance of sep for centroiding.

Sub-task INSTRM-1471 Normal Done Done karr karr EngRun Wed, 8 Dec 2021 02:31:22 +0000 Fri, 10 Jun 2022 20:22:30 +0000 Fri, 28 Jan 2022 05:28:39 +0000 ics_actorkeys 0 1 <p>This works best when the data are cropped to the useable region and the two sides processed separately, to avoid artifacts in the background subtraction and in the boundary between the two halves of the image. </p> <p>I want to use the background noise image calculated during the background subtraction for variable thresholding across the image; this isn't performing as I expected from the sep documentation and needs to be investigated further.</p> <p>I checked sep for better input parameters, and modified the code to process the two sides of the image separately. This is linked to 1479, and reading the useable regions from the yaml file. </p> <p>Current values for sep: threshold of 15, minarea=10 (the default is too small), and the defaults for filtering, etc. The over scan correction, background subtraction and centroiding are done separately for the two sides of the image.  Bad columns have a very  simple interpolation at the moment. </p> <p> </p> <p>Pushed to 1479</p> Development Rank 0|02qpik: Sprint PreEngRun05 B PreEngRun05 C PreEngRun05 D PreEngRun05 E PreEngRun05 F preEngRun07Sep