I'm in search of useful pixel math equations especially those having to do with stretching and image combinations. This info seems rather hard to find so I'm wondering if the community has a few favorites it's willing to share?
Pixel Math
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I like using pixel math to generate a DBE background model from a starless image and then undoing the star removal and subtracting/dividing that background model from the star-containing image.
Assuming you have the Normalize option enabled in your DBE model generation settings, the PixelMath is:
For subtraction: $T + med(background) - background
For division: $T * med(background) / background
Assuming you have the Normalize option enabled in your DBE model generation settings, the PixelMath is:
For subtraction: $T + med(background) - background
For division: $T * med(background) / background
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Wow, getting the feeling no one really uses PM!
I am also interested in some Pixel Math equations for combining narrowband and broadband images for galaxies. It seems there is not much information on the Internet about it.
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That's a great tool but I don't use PI. I was hoping for something more general in nature.
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I am also interested in some Pixel Math equations for combining narrowband and broadband images for galaxies. It seems there is not much information on the Internet about it.
Advanced Narrowband Combination
This guide provided by @Charles Hagen is what I use for my narrowband addition. You can manipulate the color of your narrowband by changing the 'f' value, which allows you to use it for Oiii and Sii as well. I believe his gallery, as well as mine demonstrates how well it works.
Brian Puhl:I am also interested in some Pixel Math equations for combining narrowband and broadband images for galaxies. It seems there is not much information on the Internet about it.
Advanced Narrowband Combination
This guide provided by @Charles Hagen is what I use for my narrowband addition. You can manipulate the color of your narrowband by changing the 'f' value, which allows you to use it for Oiii and Sii as well. I believe his gallery, as well as mine demonstrates how well it works.
Thank you for sharing this! I will give it a try on some of my collected data.
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