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+--- Thread: Noise filter now defaults to red but I want B&W (/Thread-Noise-filter-now-defaults-to-red-but-I-want-B-W)
Noise filter now defaults to red but I want B&W - Andyx5 - 10-07-2017
Hello,
Just started using GIMP and am trying to get to grips with creating space images. To get my star field I am using the Noise filter but for some unfathomable reason, the 'stars' keep coming out red instead of white. I've tried every reset but nothing helps. I don't know why or how this happened. Can anyone help? I saw somebody with the same issue posted to the old forum in 2010 and a reply suggested using saturation = 0. This has not helped me.
Thanking you in advance.
RE: Noise filter now defaults to red but I want B&W - Ofnuts - 10-07-2017
1) which noise filter?
2) can yo post the settings used (or a screenshot of the dialog)?
3) can you attach the output image (see here for instructions)?
RE: Noise filter now defaults to red but I want B&W - rich2005 - 10-08-2017
You do need to describe the method you are using. Might help others with the same problem.
Depending on noise filter, you get multi-coloured pixels, and if transparency is introduced often looks like they are still there. I think, depending on image size and parameters there are usually too many stars. Other than desaturate, there is Colors -> Threshold which reduces to black & white.
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I might do this: Use Hurl noise with minimum values https://i.imgur.com/5cS3r02.jpg
Apply Colors -> Threshold with the left slider almost maxed out (value here 252) That reduces the number of stars. https://i.imgur.com/mOrvENq.jpg
Again, depending on size of image, make the noise (stars) larger, Filters -> Generic -> Dilate. https://i.imgur.com/zwYrAqX.jpg
On the other hand, there is a script to produce starry-skys
https://gimpscripts.com/2014/09/starry-sky looks like: https://i.imgur.com/cXNrnQs.jpg
RE: Noise filter now defaults to red but I want B&W - Andyx5 - 10-08-2017
Many thanks for your replies.
This is a little embarrassing but it has miraculously fixed itself today without any intervention on my part . . . for now at least. I didn't even reboot.
If it happens again I will try your suggestions.
For the record, it was HSV Noise.