is there an equivalent to the Photoshop 'Cutout' filter ?

Esper · **Joined:** Jul 17, 2012 **Posts:** 2770

Photoshop has this so called 'Cutout' filter.
It simplifies lines and shapes and its very useful for making stencils.
In this video you can see how it simplifies these ships into a bunch of abstract angular shapes:

starts at 2m22s

Video from : www.youtube.com

Here you can see the Cutout filter in effect for a 'Obama-Hope Poster' style effect

starts at 7m35s

Video from : www.youtube.com

I tried to replicate the effect with G'MIC smooth [bilateral] and recursive median filtering, but it doesnt work that well.

Could a new filter be written for G'MIC, maybe ?

jamac4k · **Posted:** Tue Jun 03, 2014 7:11 am **(#2)**

# Esper:
Gimp has a script Cut Out allocated in Script-Fu → Artist → Cut Out with two parameter to work instead the three oneś of Ps.

My attemps (default values)

dinasset · **Posted:** Tue Jun 03, 2014 7:34 am **(#3)**

from the examples jamac4k provided, to my taste the outcome from GIMP filter looks much better than the one coming out from PS! (aesthetically speaking...)
a matter of opinion...

Esper · **Joined:** Jul 17, 2012 **Posts:** 2770

thank you jamac4k !

i was able to find the filter via google
looks promising !

garagecoder · **Posted:** Tue Jun 03, 2014 7:54 am **(#5)**

That looks a lot like colour quantize with a bit of smoothing, I suppose in G'MIC script something like:

Code: Select all

-median 3
-quantize 6
-pde_flow 10,30,iee

Maybe it's worth making a simple filter for (if there isn't one already!)

Esper · **Joined:** Jul 17, 2012 **Posts:** 2770

garagecoder wrote:

That looks a lot like colour quantize with a bit of smoothing, I suppose in G'MIC script something like:

Code: Select all

-median 3
-quantize 6
-pde_flow 10,30,iee

Maybe it's worth making a simple filter for (if there isn't one already!)

i used saulgoode's Quantize script before, but its not the ideal solution

plus a G'MIC filter is always superior because it has a preview...something that scripts lack

Ronounours · **Joined:** Jan 03, 2011 **Posts:** 1656

Something like this ?

Attachment:

gmic_cutout.png [ 105.36 KiB | Viewed 29388 times ]

Maybe, try to refresh your filters!

Esper · **Joined:** Jul 17, 2012 **Posts:** 2770

pretty cool ! :clap

can you add a smoothing option, please ?

EDIT: also i get funny added background in the preview, where there should be transparency

Ronounours · **Joined:** Jan 03, 2011 **Posts:** 1656

The Edge fidelity parameter already tells about the amount of edge smoothing.
Transparency problem should be fixed now.

K1TesseraEna · **Joined:** Sep 22, 2012 **Posts:** 2089 **Location:** US

It is a nice technique I wasn't aware of, thanks for bringing this up Esper!
I'll certainly use it before tracing bitmap images in AI.

David, trying your new Cutout filter and I'm getting the preview error and this

Is this a back compatibility issue [because my current gmic version is 1.5.8.1] or a bug?

Edit: Updated to the latest version, works fine

Esper · **Joined:** Jul 17, 2012 **Posts:** 2770

Ronounours wrote:

The Edge fidelity parameter already tells about the amount of edge smoothing.
Transparency problem should be fixed now.

thanks for clearing that up !
transparency in the preview is working now ! :bigthup

two more questions:

1) in the first video (the one that simplifies the ships), shapes got very abstract at high levels
is that something our G'MIC filter can do too ?

2) do we have a Quantize filter in G'MIC ? if so where is it located and whats its name ?
if not, could saulgoode's 'Quantize' script be plugged in to G'MIC, please ?!

Graechan · **Posted:** Wed Jun 04, 2014 1:05 am **(#12)**

A very nice filter thanks David

sallyanne · **Posted:** Wed Jun 04, 2014 1:05 am **(#13)**

Have I missed the tutorial how to use this? I don't see any difference in my images. Apart from colour. I also have the latest G'MIC 1.5.9.0 and gimp 2.8.10 on win 32

Esper · **Joined:** Jul 17, 2012 **Posts:** 2770

sallyanne wrote:

Have I missed the tutorial how to use this? I don't see any difference in my images. Apart from colour. I also have the latest G'MIC 1.5.9.0 and gimp 2.8.10 on win 32

there is no tutorial,sallyanne, just the three sliders

Graechan · **Posted:** Wed Jun 04, 2014 1:15 am **(#15)**

Sallyanne this is the image I used↓

these are my Gmic settings↓

This is the output↓

after applying Gmic's 'Black & White' with 'Local Contrast' set at 40 filter↓

Ronounours · **Joined:** Jan 03, 2011 **Posts:** 1656

No Esper, this is not something the Cutout filter can do (yet!).
This would imply we have some vector object simplification routines in G'MIC (which we don't have.... yet..).

sallyanne · **Posted:** Wed Jun 04, 2014 2:31 am **(#17)**

Thanks. I think I have it now.

Esper · **Joined:** Jul 17, 2012 **Posts:** 2770

Ronounours wrote:

No Esper, this is not something the Cutout filter can do (yet!).
This would imply we have some vector object simplification routines in G'MIC (which we don't have.... yet..).

i see, i was suspecting it was a vector-function judging from the shapes of the outcome

it reminded me of the shapes filter we have in G'MIC, so i hoped it would be possible
nevermind, dont know what to do with it anyway

Ronounours · **Joined:** Jan 03, 2011 **Posts:** 1656

And yes, there is a quantize filter in G'MIC, in Colors / Colormap, as shown below :

Attachment:

gmic_colormap.png [ 184.08 KiB | Viewed 4420 times ]

Esper · **Joined:** Jul 17, 2012 **Posts:** 2770

thanks again for the info !

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