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minutepapillon
Joined: 06 Apr 2010
Posts: 2
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 Posted: Tue Apr 06, 2010 12:37 pm Post subject: Stripes after gaussian blur : ugly artefact |
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Hi everyone,
I used a gaussian blur to obtain a smooth gradian.
Well, I got this ugly stripe artefact:
(enhanced with a level effect)
Any clue ?
(it's not the first time i get that ...)
Thanks a lot for any help !
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hawkeye
Joined: 14 May 2009
Posts: 2377
Location: Mesa, Az
OS: Windows 7 Pro 64 bit
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| Posted: Tue Apr 06, 2010 2:38 pm Post subject: |
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You might try using 16 bit mode. |
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minutepapillon
Joined: 06 Apr 2010
Posts: 2
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| Posted: Tue Apr 06, 2010 5:22 pm Post subject: |
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Thanks Hawkeye,
That's it ! ...
It sounds obvious now (like many questions once you have the answer ...)
In fact I suppress the stripe effect only with 32bit ...
I guess with that leveling effect i used to enhance the striping, it may be possible to see artefact no matter how deep is the color definition. So there is no reason to worry about that I guess ...
When I go back to 8bit for saving, the striping are not coming back ... so I guess the good process is :
1) Go to 32 ...
2) Do what you have to do with the image
3) back to 8
4)save ...
Is that right ?
thanks again ... |
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