Help with Aladin Contrast for Galaxies, Stars & Planets

  • Context: Undergrad 
  • Thread starter Thread starter Illogical
  • Start date Start date
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Discussion Overview

The discussion revolves around the use of the Aladin software for creating RGB images from separate images of galaxies, stars, and planets. Participants are seeking guidance on how to combine these images and assign appropriate colors based on their wavelengths.

Discussion Character

  • Homework-related, Technical explanation

Main Points Raised

  • One participant expresses confusion about how to combine three images into an RGB format and seeks assistance.
  • Another participant mentions finding an RGB image tool within the software, indicating a moment of realization.
  • A different participant shares a similar problem, noting difficulty in stacking images together without one replacing another.
  • One suggestion includes consulting the user manual, specifically referencing instructions for the color image builder.
  • A participant acknowledges the manual's usefulness but still struggles with stacking the images correctly.
  • Another participant admits to being unfamiliar with the software and unable to provide help.

Areas of Agreement / Disagreement

The discussion reflects a lack of consensus, with multiple participants expressing confusion and differing levels of familiarity with the software. No clear resolution to the issues raised has been reached.

Contextual Notes

Participants have not fully clarified the steps or settings needed to successfully combine the images, and there are unresolved issues regarding the stacking process in the software.

Illogical
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Hello guys, sorry to be a bother but I'm currently undergoing the assessment for Galaxies, Stars and Planets, and for question 3 I'm asked to "create an RGB image from these three images by assigning an appropriate colour (red, green or blue) to each one based on their wavelength."
I've already had to select the grey colour table and the Asinh contrast, but I've no idea how I combine these three images or assign a colour to each of them.
I'm hoping that some people here have used Aladin before and could give me some guidace, which would be greatly appreciated. Thanks!
 
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Is there a RGB Image tool or something?
 
Looked on image and found it, can't believe I missed it haha! Thanks a lot
 
I have the same problem this year. Using the RGB pop-up I can get the three images singly, I can't get them all to appear to be transferred together. Did you work it out? Would like to know how, if you can remember.
 
Have you looked at the user manual? The instructions for the color image builder are on page 65: http://aladin.u-strasbg.fr/java/AladinManual6.pdf
It looks like you just open the builder, assign an image to each color channel, and then click "Create".
Have you tried that?
 
Thank you very much for your reply. I have copied p.65 and it will be a help, but I haven't managed to get the three images on to the stack together. I put one on but the next one is not added to the stack. It replaces the first one. .
 
Sorry, I can't help you then. I'm not familiar with the software. :frown:
 
Thanks anyway. I'm working on it.
 

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