Ha, R, G, B data -> synthetic luminance

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Re: Ha, R, G, B data -> synthetic luminance

Post by admin »

Provided the channels/luminance are otherwise aligned and rotated correctly (they seem to be), you can do the following;
  • Import R, G and B via the LRGB module.
  • Crop the resulting RGB composite to the size of the luminance file (since it is smaller).
  • Save the result as your new color dataset.
  • Launch the Layer module, open the luminance file as the foreground.
  • Set blend to 50%
  • Use the offset filter to align the luminance file with the RGB composite.
  • Set blend to 100% and Keep.
  • Save the the result as your new luminance dataset.
Now you can process as normal.
Ivo Jager
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Re: Ha, R, G, B data -> synthetic luminance

Post by Burly »

Thanks Ivo for taking the time to reply much appreciated, what’s the easiest way to find out how big / dimension the lum file is so rgb files can be sized accordingly .

Regards Dave
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Re: Ha, R, G, B data -> synthetic luminance

Post by Burly »

Ignore previous lum file is 4615x3465 and rgb 4656x3520 i will have a go thanks

dave
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Re: Ha, R, G, B data -> synthetic luminance

Post by admin »

:thumbsup: FYI, the X x Y resolution of an image is displayed in several place in StarTools. For example, in the home screen, next to the file name. The Bin and Crop modules can also be made to displays the resolution.
Ivo Jager
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Re: Ha, R, G, B data -> synthetic luminance

Post by admin »

Also, when aligning luminance and color, make sure you check all four corners. Slight inaccuracies in the field flatness may need to be taken into account when matching up the star cores.
Ivo Jager
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Re: Ha, R, G, B data -> synthetic luminance

Post by Burly »

Thanks Ivo seem to be getting somewhere now though I always struggle with colour, will have a play when I get a minute and post an image .
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