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Question #2355

Aligning images to DEM or DSK

Added by Luke Hawley about 2 years ago. Updated about 2 years ago.

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In Progress
Priority:
Normal
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Category:
Applications
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Description

I'm working with color ratio image mosaics of Vesta and using the Vesta DSK. As the DSK is high resolution and the camera pointing on my images is not perfect, misalignment between them can cause noise when photometrically correcting.
Is there any way I can tie images to a DSK or DEM or otherwise make sure they are aligned?
Thanks!

History

#3 Updated by Tammy Becker about 2 years ago

  • Status changed from New to Acknowledged
  • Assignee set to Tammy Becker

Adjusting the camera pointing of your images can involve a suite of ISIS photogrammetric applications. We have limited documentation on how to do this. I can point you to a few on-line resources to start with. First, it will be best to tie your images to a DEM (rather than a DSK); you can apply 'shade' to create a shaded-relief version in order to help visually tie horizontally to the common features.

References:
https://isis.astrogeology.usgs.gov/IsisWorkshop/index.php/Multi-Instrument_Registration - a lesson on how to use deltack (if you only have a few images, you can adjust their pointing with this application using a couple of control points measured on the DEM) or the interactive application similar to deltack is 'qtie' (https://isis.astrogeology.usgs.gov/IsisWorkshop/uploads/0/09/Qtie_demo.pdf)

If you have a large number of images, you can go through a series of steps to build a control network and our bundle adjustment application, jigsaw.
https://isis.astrogeology.usgs.gov/IsisWorkshop/uploads/8/80/Qnet_demo.pdf (interactive control point editor)
https://isis.astrogeology.usgs.gov/IsisWorkshop/index.php/Working_with_Mars_Reconnaissance_Orbiter_HiRISE_Data (takes you through non-mission specific steps to create a control network)
https://isis.astrogeology.usgs.gov/IsisWorkshop/uploads/1/12/Jigsaw_demo.pdf

Hope this helps!

#4 Updated by Tammy Becker about 2 years ago

  • Status changed from Acknowledged to In Progress

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