Recursive Subdivision of an Image, can't get it solved

Hey all,

I'm trying to recursively subdivide a surface with the input from a black and white picture. I found an image of jimi hendrix on the web:

http://farm9.staticflickr.com/8021/7685949058_b5ea953259_z.jpg

To recreate this i wrote a gh-file with Hoopsnake. But I seem to get stuck on a part where i think the problem lies within the data i get from some parts. I am quite a beginner in grasshopper and rhino but have come as far that the surface at least wants to subdivide.

Problem:

I think I cannot get the proper data out of the image for the subdivision to work. (Or I havent found a way to do so)

Goal:

What i want to reach is that the surface divides into smaller square surfaces on the places where the black&white picture is more black. The white parts in the picture should have bigger square surfaces.

For a next step I would like to be able to change the 'gradient' of the subdivision, where i can change the level of shade needed for the subdivision. This allows me to reach different variants on 1 picture

Also i would like to make a 3d model out of this: By giving the big surfaces alot of height, and the smaller surfaces a smaller height, it would be possible to make a kind of 'landscape' of the picture.

Could anyone help me with this? Or some tips/tutorials?

Cheers

Attachments:

RecursiveSubdivisionImage-GHCode.jpg, 166 KB
RecursiveSubdivisionImage-ResultinRhino.jpg, 116 KB
RecursiveSubdivision-ImageTest.gh, 11 KB

Replies to This Discussion

Permalink Reply by Shridhar Mamidalaa on May 14, 2015 at 9:20pm

Here is a Non-Recursive process.

Attachments:

Image sampler.gh, 42 KB

Permalink Reply by Michael on May 15, 2015 at 7:01pm

Wow, Looks good man!

I am trying to understand everything and I haven't used the quadtree component before. Is it the best way to create the squares in a recursive subdivision?

I tried combining ideas of this definition with my own one in some ways but it wont work :/

The way the values are taken from the picture are fine for a black and white, but i tried to do a grayscale one, where there are alot of shades. It didn't work because the smaller than component just outputs the difference between black/white.

Could someone help me out with maybe another way to do this? Or how to do this with recursion?

(I tried it with this picture in my definition)
http://images5.fanpop.com/image/photos/27700000/penguins-windows-7-...

Thanks in advance guys

Permalink Reply by Shridhar Mamidalaa on May 15, 2015 at 8:36pm

The jimi hendrix image u showed as reference should have been a vector art like this than just a grey scale image. If u r trying to work with gray scale images u need to optimise things for yourself like the

1)number of points u provide

2)just average component will not help u select points with values

3)number of squares to group in Quadtree component.

Permalink Reply by Michael on May 17, 2015 at 9:58pm

Okay thanks for the tips, ill try and work it out!

I found the base picture from which the jimi hendrix is made:
http://www.911tabs.com/img/upload/band_bg/2222_jimi_hendrix_min.jpg

Ill post when i find out more, thanks for the help man!

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