Madratter's AstroImaging
  • Home
  • About
  • PixInsight Tutorial
    • Overall Workflow and Cropping
    • The Screen Transfer Function (STF)
    • Gradient Removal
    • Deconvolution
    • Deconvolution Pt. 2
    • Stretching the Image
    • Noise Reduction
    • Combining the Color Channels
    • Color Calibration
    • Stretching the Color Data
    • Saturation (Color Boost)
    • LRGB Combine
    • MLT Noise Reduction
    • Tutorial Comments
  • Equipment
    • Intro To My System
    • Software
    • Does Mono Take More Time?
    • Other System Threads
  • More
    • Collimating an AT8RC
    • Combining HA with RGB
    • Common Mistakes
    • Frequently Asked Questions
    • Focal Ratio
    • Getting Good Color
    • Guiding and Chasing Seeing
    • Integration Time Comparison
    • Ivo Jager's M33 Tutorial for StarTools
    • Quantum Jumps
    • Useful Links
    • What It Takes To Succeed At Astrophotography
  • Blog
  • Galleries
    • Arp Galaxies
    • Messier Album
    • Non Astrophotography
Combining the Color Channels:

Bring up the R, G, and B stacks as well as the channel combination tool. Assign the stacks appropriately.
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Now press the blue circle on the bottom left to actually combine the channels into one color image. Then do a ScreenTransferFunction to see the results. Make sure you unlink the channels (top right in STF window, the icon that looks like two chain links). Otherwise your result with be a rather ugly yellow-green.
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Crop out the bad edges with the DynamicCrop tool just like you did earlier with the luminosity channel. If you redo the STF, the result will now reveal some rather unfortunate things.
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Do another DynamicBackgroundExtraction. You'll need to be sure to close the DynamicCrop tool first. I auto-generated a bunch of points but then needed to move many of them and create more.
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My samples:
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This is beginning to look reasonably good, even without the luminosity applied. There is 2 1/4 hours of data here, so that is not completely surprising.
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