Add dithering to Gaussian Blur

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Participant ,
Feb 09, 2022 Feb 09, 2022

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Problem: Blurring causes banding/posterization (for 8-bit/channel files). It is most apparent with very heavy (large radius) blurs.

 

Gaussian blur is the most commonly used blur filter. I suggest adding a dithering option to it (for adding a diffusion dither). A simple checkbox would do:

 
 

Chain83_2-1644421639500.png

 

 

Side notes:

If someone has visible banding, they might try to use gaussian blur to blend the steps to fix it. This will often not work well (if in 8-bit) since Gaussian Blur isn't dithered. A workaround is to use the old Spatter filter set to Smoothness 1 (after the gaussian blur). Very few people would be aware of this, so it would be better if Gaussian Blur did a better job! 🙂

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