taskGNU Astronomy Utilities - Tasks: task #14139, Set threshold for no erosion


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task #14139: Set threshold for no erosion

Submitter:  Mohammad Akhlaghi <makhlaghi>
Submitted:  Mon 29 Aug 2016 12:23:11 AM UTC
Should Start On:  Sun 28 Aug 2016 03:00:00 PM UTC Should be Finished on:  Sun 28 Aug 2016 03:00:00 PM UTC
Category:  NoiseChisel Priority:  7 - High
Item Group:  Enhancement Status:  Done
Privacy:  Public Assigned to:  makhlaghi
Percent Complete:  100% Open/Closed:  Closed
Effort:  0.00

Mon 29 Aug 2016 01:30:51 PM UTC, comment #1: 

This has been done and is now pushed to master.

Mohammad Akhlaghi <makhlaghi>
Group administrator
Mon 29 Aug 2016 12:23:11 AM UTC, original submission:  

NoiseChisel's first operation after applying the quantile threshold is to erode those pixels above the threshold.

For large and diffuse objects this can be no problem and the eroded pixels are later returned. However for small and sharp objects the erosions can completely carve it out.

I am now working on a solution to this problem and my initial tests were promising. Essentially we can disable the erosion of pixels that are too bright. This will allow those pixels to remain and thus we won't loose such sharp small objects in the image.

Mohammad Akhlaghi <makhlaghi>
Group administrator


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