bugGNU Astronomy Utilities - Bugs: bug #51372, NoiseChisel segfault when no...


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bug #51372: NoiseChisel segfault when no usable region for sky clumps

Submitter:  Mohammad Akhlaghi <makhlaghi>
Submitted:  Mon 03 Jul 2017 02:58:53 PM UTC
Category:  NoiseChisel Severity:  3 - Normal
Item Group:  Crash Status:  Fixed
Privacy:  Public Assigned to:  makhlaghi
Open/Closed:  Closed

Mon 03 Jul 2017 03:21:16 PM UTC, comment #1: 

This bug has been fixed and pushed to the main repo.

Mohammad Akhlaghi <makhlaghi>
Group administrator
Mon 03 Jul 2017 02:58:53 PM UTC, original submission:  

It may happen that the number of usable pixels to define clumps over un-detected pixels in some tiles are zero.

However, the sky clump identification and S/N calculations aren't ready for that. In such a case, at the start of segmentation, NoiseChisel would crash with a "segmentation fault (core dumped)".

The particular case that this happend was when a large area of the surroundings of the image were blank. So many tiles were blank. However, the image and tile sizes resulted in some tiles only having one row of overlap with the non-blank image. Since all pixels on the edge of a tile are not considered in finding clumps over the sky region, the result was that there were actually no usable pixels for sky segmentation within the tile.

This bug was reported by Raúl Infante Sainz and Nacho Trujillo.

Mohammad Akhlaghi <makhlaghi>
Group administrator


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    Date Changed by Updated Field Previous Value => Replaced by
    2017-07-03 makhlaghi StatusIn Progress Fixed
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