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One of the main issues of imaging with a dslr or mirrorless camera is obviously digital noise. How do you deal with it? What technique/trick/software do you use to limit such noise? NGC 7635 - wide field |
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Some "obvious" techniques include the use of proper calibration frames in my stack, dithering, travel to dark skies locations, good signal-to-noise ratio, long exposures. As for software, Denoise AI does a great job for me, but I use it only on a starless version of my stack, that I then combine with my "starry" image as a luminance layer. The reason is that Denoise AI wasn't built for astrophotography and it ruines the stars in my images. Astronomy Actions for Photoshop as some good noise reduction actions too. |
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Alessandro Cernuzzi: I use Topaz as well, but usually subtly, early on in the processing (as soon as I get the image into Photoshop). I rarely use the "AI" setting - "Clear" often has fewer artifacts, and sometimes "Low Light" is useable. I drag the colour noise reduction slider up to match the general NR slider. Astronomy Tools Action Set has two de-noise actions (Space NR & Deep Space NR) which work MUCH better for astrophotography. https://www.prodigitalsoftware.com/AstronomyToolsActions.html Those I use as a finishing touch. My images are still pretty noisy because I've got so little time to image, I'm fighting Bortle 8 skies and my CLS filter is pretty brutal. But these tools help! CS! Mark |
