Hi, i want to split geometry when the color of an image changes. Is that possible? And what would your approach be? Can i read from file (the image) and get the border of black versus another color and make a line at that point? mandala.dyn (19.7 KB) [PNG] [mandala2]

[image] Marcel_Rijsmus: Can i perhaps split up the image by color make anything red-like into red Hope this gives you some ideas … [img-gtry-red] img-gtry-red.dyn (19.8 KB)

I would think that unique pixel creation in the first instance would be much faster than a recursive splitting of any geometry, at least that was the workflow I was using. I was also testing the of sorting points based on their colors to enable smaller surfaces to be created as zones, (kind of like…

If we’re talking about pixelated geometry - it’s easy. Read the image as a desired amount of pixels. Build geometry with the same amount of square surfaces. Group the surfaces by R G B values and then… do whatever you want to do with that… If the goal is vectors… I’d go for a vectorizing software…

I’ve tried my own approach as proof of concept, it work but is very heavy on memory to the point where all 16Gb is used and it starts spooling. So this is not a working solution. geo_from_image.dyn (24.6 KB) [image] Will try a divided suface now. Edit: divided surfaces can only handle up to 200…

@Marcel_Rijsmus So here is a working pixel prototype, with a very small image your proof of concept is good. (Note that for larger images run-time has been quite slow as expected) This method requires pre-processing of images to create a skeleton and color map to keep edges crisp. I used https:/…

Thanx @Ewan_Opie :+1: I can’t download the test images but that’s a forum issue i think. can you Zip them and upload again. i have to study this.

@Marcel_Rijsmus Improved quality of the below approach takes very long. [img-gtry] img-gtry.dyn (12.8 KB) imgDim = Image.Dimensions(img); pxlWdt = imgDim["width"]/15; pxlHgt = imgDim["height"]/15; pntGrd = List.Reverse(Point.ByCoordinates ((0..pxlWdt-1)<2>,(0..pxlHgt-1)<1>)); pxlClr = Image.Pi…

Thanx @Vikram_Subbaiah Can i perhaps split up the image by color make anything red-like into red, and make a surface out of that? It just might take 4 goes for every basic color red,green,blue and black but it might also be quicker.

Why not just black? (Image quality perhaps?)

i would like to be able to have a set of different materials for every type of stained glass to make it look good. thnx @jacob.small

Well, I may be mistaken, but doesn’t stained glass there is a black border between each color. If so: Split the original surface at the black pixels. Use the resulting surfaces as hosts for the new colors, getting the color value at the center of each new surface (you may need to rebuild by Surfac…

Process Images to Split geometry for Color changes

Geometry

jacob.small May 15, 2019, 4:14pm 21

Yeah it’s a big one… super helpful for “paint by numbers” books too.

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Process Images to Split geometry for Color changes

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