Popular Post mightymonoped Posted May 14 Popular Post Share Posted May 14 First time trying to use the Pixelmath/SPCC approach to merging RGB and Ha data. In this case only an hours worth of Ha so I've been a bit cautious on pushing the saturation. Not as good as some of the excellent RGB+Ha shots on here but this is the first time I have felt happy with the process as something controllable and repeatable. Pity I never had good flats for this set of data but I'm definitely going to add more Ha to it, now that I know how to add it to the whole. Stacked and registered in AstroPixel Processor for both RGB and Ha images (both treated for Light Pollution too). NoiseX and BlurX for the RGB in PI SPCC for RGB image Pixelmath Ha merge (at $T* 0.3 + Ha* 0.7) SPCC again Super Hyperbolic Stretch using Bill Blanshan script. Saved as Tiff then artificial flattening using Astro Flat Pro in Photoshop CC. Final saturation and Sharpening using APF-R (at 50% transparency). Tony 11 Quote Link to comment Share on other sites More sharing options...
RaDec Posted May 15 Share Posted May 15 Excellent image Tony, some real depth in there. Nice extra fluffies too! 1 Quote Link to comment Share on other sites More sharing options...
mightymonoped Posted May 16 Author Share Posted May 16 9 hours ago, RaDec said: Excellent image Tony, some real depth in there. Nice extra fluffies too! Thank you! 😊 Quote Link to comment Share on other sites More sharing options...
Astrobdlbug Posted May 16 Share Posted May 16 Great M101 Tony, caught good detail in the inner arms plus the more nebulous outer arm 'fuzz', the Ha regions are subtle, but present. Its interesting using SPCC to re-calibrate the Ha content in the image, or is it the pixelmath equation that determines the contribution... I read about the method and couln't quite work out wherethe balance was and also all done on liner data. I personally went for a red channel subraction method using non-linear images for RGB-OSC and Ha, I possibly over saturated the Ha in my rendition. Like your version also, and hopefully you can grab another hour or two of Ha to see how that effects the resulant image Bryan 1 Quote Link to comment Share on other sites More sharing options...
mightymonoped Posted May 17 Author Share Posted May 17 14 hours ago, Astrobdlbug said: Great M101 Tony, caught good detail in the inner arms plus the more nebulous outer arm 'fuzz', the Ha regions are subtle, but present. Its interesting using SPCC to re-calibrate the Ha content in the image, or is it the pixelmath equation that determines the contribution... I read about the method and couln't quite work out wherethe balance was and also all done on liner data. I personally went for a red channel subraction method using non-linear images for RGB-OSC and Ha, I possibly over saturated the Ha in my rendition. Like your version also, and hopefully you can grab another hour or two of Ha to see how that effects the resulant image Bryan Not entirely sure how it works under the hood myself tbh. SPCC is a bit of a temperamental beast for me, sometimes it works, sometimes it doesn't and I have no desire to disappear down that particular technical rabbit hole 🤣 Quote Link to comment Share on other sites More sharing options...
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