GNU Astronomy Utilities - Tasks: task #13565, Add non-linear warpings.
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task #13565: Add non-linear warpings.
Submitter: | Mohammad Akhlaghi <makhlaghi> | ||
Submitted: | Mon 20 Apr 2015 06:31:32 AM UTC | ||
Should Start On: | Sun 19 Apr 2015 03:00:00 PM UTC | Should be Finished on: | Sun 19 Apr 2015 03:00:00 PM UTC |
Category: | Warp | Priority: | 3 - Low |
Item Group: | New feature | Status: | In Progress |
Privacy: | Public | Assigned to: | pedram |
Percent Complete: | 60% | Open/Closed: | Open |
Effort: | 0.00 |
Jump to the original submission
Wed 09 Feb 2022 06:40:56 PM UTC, comment #6: |
Pedram Ashofteh-Ardakani <pedram> |
Wed 09 Feb 2022 06:31:35 PM UTC, comment #5: OK, it looks like the 'tpv-aligned-warp.fits' file was not uploaded successfully. I am submitting it now. It looks like savannah does not indicate if the file is uploaded completely before submitting. So I will wait a bit before submitting this comment. |
Pedram Ashofteh-Ardakani <pedram> |
Wed 09 Feb 2022 06:25:33 PM UTC, comment #4: Hi all. I have been working on nonlinear warp with Mohammad on this git branch.
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Pedram Ashofteh-Ardakani <pedram> |
Mon 16 Mar 2020 05:52:59 PM UTC, comment #3: By the way, another good program that can be a good reference are SWarp (source on Github) and SCAMP (source on Github). The good news is that both these programs are in C and they are very commonly used many astronomical projects.
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Mohammad Akhlaghi <makhlaghi> |
Mon 16 Mar 2020 02:44:20 AM UTC, comment #2: Thanks for the nice review. Generally in astronomy data (the FITS standard), the World Coordinate System (WCS, Section 8 of that paper, see references in the first paragraph of that section) also has standards to define distortions. |
Mohammad Akhlaghi <makhlaghi> |
Sun 15 Mar 2020 10:32:20 PM UTC, comment #1: This paper gives a very nice method to correct optical distortion, which can also fix the sky distortion problem. The Wikipedia page also suggest a similar way but its a bit complex. In all these methods there is the distortion coefficient(k) is required. Now this paper provides an analytical way to find the coefficient. But it's complex to implement(thoughts?). We can just ask the user to provide these coefficients based on their own calibrations.
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Sachin Kumar Singh <sks_15> |
Mon 20 Apr 2015 06:31:32 AM UTC, original submission:
Currently only homographic (linear) warpings are included. Allow for non-linear warpings for applications like correcting optical distortion, celestial coordinate mapping or weak lensing. |
Mohammad Akhlaghi <makhlaghi> |
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Items that depend on this one: None found
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Follow 6 latest changes.
Date | Changed by | Updated Field | Previous Value | => | Replaced by |
---|---|---|---|---|---|
2022-02-09 | pedram | Attached File | - | Added tpv.fits, #52827 | |
Attached File | - | Added tpv-aligned-swarp.fits, #52828 | |||
Attached File | - | Added coverage.jpg, #52829 | |||
Status | Postponed | In Progress | |||
Percent Complete | 0% | 60% | |||
Assigned to | None | pedram |
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Corresponding source code
OK forget it, I am uploading it here :-)