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How to generate ink spreading effect in Paint.net?


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I need to give ink spread effect (something like feathering, but not exactly that) to an image resembling fountain pen ink on low-quality paper such as newspaper or cheap copy paper.

 

So far, I have tried following effects, as well as many others, but none of these has given desired result.

 

Effects > Artistic > Oil Painting

Effects > Blurs > Gaussian Blur

Effects > Distort > Crystalize
Effects > Distort > Dents
Effects > Distort > Frosted Glass

Effects > Object > Feather
Effects > Object > Feather Object
Effects > Object > Old Feather

 

If anyone knows, how to achieve the desired effect, please guide me.

 

Ink_spread_1.png

Ink_spread_2.png

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Existing plugins to create feathering or edge softening effect render symmetric and very limited effect, where as I need to generate asymmetric ink spread effect. A good mix of ink fading, feathering, bleeding and ghosting would do the job.

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1 hour ago, Firano said:

"Median blur" is not available on my Paint.net instance.


Median Blur will be available in paint.net 5.1, which is currently in beta testing.  It's mentioned in this post https://forums.getpaint.net/topic/126920-paintnet-51-alpha-build-8900/

 

Go to the Preview Center if you wish to install the latest beta.

 


 

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I recommend experimenting with Furblur (short length and all directions) and Grow (Many iterations and with 'edge randomness set high).

 Ink%20spread.png

NB. Both effects run quicker if used within a selection that is slightly larger than the relevant area.
So the effects don't have to process the whole layer.

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Red ochre Plugin pack.............. Diabolical Drawings ................Real Paintings

 

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Here's my approach with Furblur as per Red Ochre's idea, Median (or Median blur, regardless of your version it should have similar results) and Levels adjustment.

 

I drew "ink blots" at the end of the lines manually, then applied Furblur with maxed out length and angle variation and main length tuned to have moderate fuzz no more than twice the line thickness (I used 15 for this example thicknesses). Finally, I applied Median (blur) with radius set to 4 and percentile 85 to eliminate the strands and round things towards white, then used Levels adjustment to make it crisp black, for this example I set input levels to 191-230.

image.png.663c78c945221647cb96674d903dcccc.png image.png.380b524316312b3ad50fc021176aa85f.png

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