Grayscale image

Image processing, astrometry, photometry, etc.
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Rudi
Posts: 160
Joined: 08 Jan 2019, 04:47

Grayscale image

Post by Rudi » 15 Jan 2019, 07:56

How do I convert a RGB image to grayscale?

Is that simply using the command Color -> Luminance?
/Rudi
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fabdev
Posts: 500
Joined: 03 Dec 2018, 21:43

Re: Grayscale image

Post by fabdev » 16 Jan 2019, 16:11

Yes, or with the command Edit/Data format/Graytones, the result is the same.

The formula used is the standard: L = 0.59G + 0.30R + 0.11B
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Rudi
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Re: Grayscale image

Post by Rudi » 16 Jan 2019, 17:11

Thanks for the answer.
/Rudi
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