G'MIC Challenge: Create image from photographs with a single line

Software G'MIC
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The only rule is that resulting image must consist of single line, and duotone color, and the input must be a photograph. You can make background as transparent. There can be overlap or even stylistic twist.

Example:

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I get the feeling you have one prepared?

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I don’t really understand what it is about TBH.

EDIT: Now, with the example, I get it.

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I only have a theory on this. Use arrays, and draw curves using array as reference until there is enough details or coverage. When it’s a challenge, it is something that’s pretty difficult to code up and the purpose of the challenges I make is to try to find a solution.

Provided a example

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A common art exercise. I would like the squiggly lines outside of detail regions to be less dense and angular, and detail regions to be less random as to preserve the textures.

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Not using G’MIC, sorry, but Lithographic effects using IM.
x2

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Pretty cool stull, Reptorian; didn’t know you can do TSP artwork in G’MIC… If you created the preset, hope you share it in your G’MIC plugin preset. Now if someone could do a variable density Hilbert curve render (posted request below). lol :slight_smile:

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OK, Reptorian. Because I have no clue how you did this in G’MIC, I had to use tools that I know of to do so. :slight_smile:

tsp_me
tsp_me1920×1920 905 KB

1 Like
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If I read correctly, I don’t think Rep has a solution yet; hence the challenge. Yours is different in that I don’t think there is overlap of the path.

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Yeah; we had a thread on Traveling Salesman (well Sales person) at GIMPChat a while back. Still have to tools (and at least a good memory for how to use them), afre. lol

:slight_smile:

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ref: Human Skulls – 54 Free Images | Media Militia

Expand below for SVG output:

Summary

media_militia_skulls_001

Picked a skull from Media Militia’s site and extracted it on white background and did some additional magic before feeding it into Voronoi Stippler and then that result into TSP script. Then I smoothed the path some before stroking the path. Just a bit more fun before I hit the hay for another 10 hour tomorrow (well later today). lol

:slight_smile:

media_militia_skulls_001
media_militia_skulls_0012024×2896 1.63 MB

1 Like
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TSP was added to gmic a while ago with command tsp - mentioned here:

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Should have known the G’MIC team would have done so by now, GC. lol

Need to see if it’s available within the GIMP plugin itself since I don’t CLI. :slight_smile:

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Voronai Stippling sounds like a cool idea for G’MIC. @David_Tschumperle : Is modifying Voronai is feasible? In addition, it would be nice to have just the coordinates of vertexs as a image instead of points.

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Oh, feathers. A frivolous way to burn off a Sunday morning, with bagels and a smear of cream cheese.

foo:
   sp portrait2,1024
   +r2dx. 25%,5
   luminance.
   apply_curve. 1,0,0,90,0,160,255,255,255
   n. 0,1
   oneminus.
   noise. 0.4
   threshold. 65%
   pointcloud. 3
   channels. 0,1
   *. 4
   tsp. ,
   permute. cyzx
   nm. points
   i 1024,1024,1,1
   nm. canvas
   eval {V=crop(#$points);polygon(#$canvas,-size(V)/2,V,1,0xffffffff,255)}
   keep[0,-1]

And then:

gmic foo.gmic foo orig.png tsp.png

orig
orig1024×1024 1.1 MB

Traveling salesman version:

tsp
tsp1024×1024 34.9 KB

Feeding ~4K – ~7K of points to ‘tsp’ probably shouldn’t be done on @afre 's celebrated laptop…

2 Likes
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@grosgood
Thank you for this script using ‘tsp’.

test_tsp
test_tsp1021×1301 139 KB

2 Likes
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Really cool, grosgood; great result too, samj. Hopefully the code will run in G’MIC GIMP plugin. :slight_smile:

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Theirs is a deconstruction of both rep’s and yours. Ha ha.

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Just tried; no dice. I guess to use TSP in G’MIC, you have to go CLI. lol

:slight_smile:

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So, it doesn’t work from the custom command filter? I can’t try because