SCNR |
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Subtractive Chromatic Noise Reduction |
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SCNR is used mainly to deal with green noisy pixels. The idea of SCNR is quite simple. most deep sky objects do not contain green and there are no green stars. We may conclude that if we find green pixels on a color balanced, deep-sky astrophoto, they are noise. You can Use SCNR at any time but its usually towards the end of your process You will be pleased to hear SCNR is very easy to use ! |
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This is the panel of the tool when opened |
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A) Selects colour to be removed , You can also remove red and blue pixels if req B) Protection Method -- Prevents destruction of good green, suggest leave default C) Amount- Controls aggressiveness, I have used settings from 0.5 to 1 D) Preserve Luminance-Suggest leave default as it always a good idea |
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How to use SCNR |
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1) Open tool and leave all as default to start with and apply to image 2) Decide from result if you need to reduce amount , sometimes it can turn things to blue ! Told you it was easy to use. |
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Roll mouse over image for before and after
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