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  1. Data Management
  2. DM-9644

Write out true galaxy images in blending simulation script

    Details

    • Type: Story
    • Status: Done
    • Resolution: Done
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None
    • Story Points:
      2
    • Sprint:
      DRP S17-4, DRP S17-5, DRP S17-6
    • Team:
      Data Release Production

      Description

      When comparing the effectiveness of the deblender it useful to have the true light distribution of an isolated galaxy to compare the output of the deblender. The blending simulation script in DM-8624 currently stores the true total flux of each object, but nothing else. This ticket is to add true spatial information to the script in DM-8624 for each object.

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            rearmstr Bob Armstrong added a comment -

            I've attached the updated simulation script to include stars (from DM-9640) and to write out the true galaxy images. Currently it writes a separate file for each galaxy, but that can be changed if that would be more helpful.

            Fred Moolekamp, can you look at the code and check to see if it provides what you need?

            Show
            rearmstr Bob Armstrong added a comment - I've attached the updated simulation script to include stars (from DM-9640 ) and to write out the true galaxy images. Currently it writes a separate file for each galaxy, but that can be changed if that would be more helpful. Fred Moolekamp , can you look at the code and check to see if it provides what you need?
            Hide
            fred3m Fred Moolekamp added a comment -

            We talked about this earlier but I felt I should update the ticket for completeness. Ideally I'd like the output to be the exact same catalog format as the previous version of the simulation code, with additional columns "intensity_

            {filter}

            " that contain a masked image for each filter.

            Show
            fred3m Fred Moolekamp added a comment - We talked about this earlier but I felt I should update the ticket for completeness. Ideally I'd like the output to be the exact same catalog format as the previous version of the simulation code, with additional columns "intensity_ {filter} " that contain a masked image for each filter.
            Hide
            rearmstr Bob Armstrong added a comment -

            I have updated the code as requested by Fred. I believe this should finalize this ticket.

            Show
            rearmstr Bob Armstrong added a comment - I have updated the code as requested by Fred. I believe this should finalize this ticket.
            Hide
            fred3m Fred Moolekamp added a comment -

            Bob Armstrong, let me know when you've generated a new set of test images and catalogs with the script so that I can check them.

            Show
            fred3m Fred Moolekamp added a comment - Bob Armstrong , let me know when you've generated a new set of test images and catalogs with the script so that I can check them.
            Hide
            rearmstr Bob Armstrong added a comment -

            Images have been created in the same directory as before on tiger /tigress/rea3/sim_deblend. Please check them.

            Show
            rearmstr Bob Armstrong added a comment - Images have been created in the same directory as before on tiger /tigress/rea3/sim_deblend. Please check them.
            Hide
            fred3m Fred Moolekamp added a comment -

            Have these bee updated yet since our conversation this afternoon? If not, just let me know when to re-check them.

            Show
            fred3m Fred Moolekamp added a comment - Have these bee updated yet since our conversation this afternoon? If not, just let me know when to re-check them.
            Hide
            rearmstr Bob Armstrong added a comment -

            Yes, thanks for the reminder. They are updated.

            On Thu, Apr 27, 2017 at 4:31 PM, Fred Moolekamp (JIRA) <jira-dm@lsst.org>

            Show
            rearmstr Bob Armstrong added a comment - Yes, thanks for the reminder. They are updated. On Thu, Apr 27, 2017 at 4:31 PM, Fred Moolekamp (JIRA) <jira-dm@lsst.org>
            Hide
            fred3m Fred Moolekamp added a comment -

            The new images and catalogs look great! Objects are much more blended and the true galaxy images make it easy to calculate the overlap.

            After speaking with Bob Armstrong earlier, I added an ipython notebook testSimData.ipynb that I used to test the images in a ticket branch, which might be useful later if this script changes in the future and we want to look at the new test datasets.

            Show
            fred3m Fred Moolekamp added a comment - The new images and catalogs look great! Objects are much more blended and the true galaxy images make it easy to calculate the overlap. After speaking with Bob Armstrong earlier, I added an ipython notebook testSimData.ipynb that I used to test the images in a ticket branch, which might be useful later if this script changes in the future and we want to look at the new test datasets.

              People

              • Assignee:
                rearmstr Bob Armstrong
                Reporter:
                rearmstr Bob Armstrong
                Reviewers:
                Fred Moolekamp
                Watchers:
                Bob Armstrong, Fred Moolekamp
              • Votes:
                0 Vote for this issue
                Watchers:
                2 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved:

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