Noise filter is amongst most widely used filters in any image editing software. Native Krita Noise Filter is very poor and it can't be limited to alpha channel. Since many features of Krita are much better desingned compared to similar software, why it can't be done with Noise Filter as well? I can imagine universal noise filter that can give control over a range of parameters such as noise type, contrast and frequency. G'MIC versions of Noise Filters are not very flexible and very slow. Much respect for powerful developers of Krita.
I am marking this as confirmed for being a wishlist item. The ticket would be to improve the noise filter. Can you give a little more detail. I see this so far. 1. Make noise filter work on alpha channel Krita isn't really designed for doing tons of filters. This might be a better request for the G'MIC team
(In reply to Scott Petrovic from comment #1) > I am marking this as confirmed for being a wishlist item. The ticket would > be to improve the noise filter. > > Can you give a little more detail. I see this so far. > 1. Make noise filter work on alpha channel > > Krita isn't really designed for doing tons of filters. This might be a > better request for the G'MIC team 1. I think if a pixel on a layer is 100% (or 50%) transparent, Noise Filter should keep it 100% (or 50%) transparent, and that is not a case. At least on my machine. 2. Well, then I'll request G'MIC team. But if I think of 4 or 5 filters that I would take with me on a deserted island, noise filter will be one of them.
Created attachment 112129 [details] Examples of how improved Noise Filter should work
> G'MIC versions of Noise Filters are not very flexible and very slow. @DusanVuk : Have you tried the one in the GMIC category: Film Emulation > Add grain ? It has blending mode, scale, opacity and it's quick to compute.
Created attachment 112147 [details] G'MIC_FilmEmulation_AddGrainFilter_ERROR
1) I just have tried it (Film Emulation>Add Grain) and it doesn't work. I am going to see to contact Author to help me try to make it work. If you have any ideas, much appreciated, it seems to be a great filter. Attachment with a message on filter crash: https://bugsfiles.kde.org/attachment.cgi?id=112147 2) I understand Krita developers are buried under tons of bug reports and requests so I'm not going to bother anymore with my request. Maybe the bad impression on Noise Filter I had while running Krita 2.x is not relevant anymore since we now have G'MIC within Krita. I mean, if devs just polish Krita as it is now, it will be true perfection. If there is any other way I can be helpful, just let me know:)
@DusanVuk 1. Thank you for reporting the GMIC filter issue on your platform. 2. I was just suggesting with the GMIC filter a temporary workaround. Your request for a good filter to add grain is totally legit. If a good "Add grain" filter was inside Krita official filter, we could use it as a Filter Layer ; less destructive to add the grain as a dynamic effect on the top of the layer stack for end-compositing. It's really interesting.
Thank you for interest. I think usage for end compositing is obvious advantage of inside Krita filter. Allow me couple of days to "throw on paper" some ideas on that subject, but briefly, I think of filter that can give analog feel may it be drawing, painting, 3d render or photo-realistic art.
Created attachment 112233 [details] Few ideas on Krita native Noise Filter improving
Comment on attachment 112233 [details] Few ideas on Krita native Noise Filter improving Thank you DusanVuk for this PDF rich of examples and documentation. I like your propositions. Now it might take time until someone with skill in development of filter be interested into taking in charge of this task, so let's wait and see.
(In reply to David REVOY from comment #10) > Comment on attachment 112233 [details] > Few ideas on Krita native Noise Filter improving > > Thank you DusanVuk for this PDF rich of examples and documentation. I like > your propositions. Now it might take time until someone with skill in > development of filter be interested into taking in charge of this task, so > let's wait and see. I am delighted to know that I, in some modest way, have taken part in development of Krita. Big thanks:)