Author Topic: Noise standard deviation  (Read 3008 times)

Offline dlp

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Noise standard deviation
« on: 2011 January 16 10:44:42 »
If I'm evaluating noise, PI gives me a standard deviation figure. I've forgotten my basic maths! Is a higher SD lower noise or higher please?

David




Offline Carlos Milovic

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Re: Noise standard deviation
« Reply #1 on: 2011 January 16 12:26:23 »
The standard deviation is a measure of how spreaded are the values. Larger values means that the data is more dispersed at both sides of the medium value. So, higher the SDTDEV, higher is the noise.
Regards,

Carlos Milovic F.
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PixInsight Project Developer
http://www.pixinsight.com

Offline dlp

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Re: Noise standard deviation
« Reply #2 on: 2011 January 16 12:30:51 »
Thanks!