Image sampler point density

Replies to This Discussion

Permalink Reply by David Rutten on September 28, 2010 at 1:58am

Haven't tested this, but you could iterate over the whole image in a fine-grained manner, using the brightness as a guide for random point placement. The darker the image the more likely it is to add a point.

This should give you an initial approximation. You will then probably need to distribute the points a bit more equally as a random distribution never looks well balanced. You could create a Delaunay mesh from the points then smooth the mesh. This last step is a Rhino operation though.

The hardest thing about a process like this is that you want smooth point gradients on fills but sharp point groups on edges.

--
David Rutten
david@mcneel.com
Poprad, Slovakia

Permalink Reply by Alex Fritz on October 11, 2010 at 1:39pm

Hey thanks a lot David! I ran a Delaunay to redistribute the points, and manually edited a few outlying points in Rhino after baking but the result was what I was looking for.

Alex

Permalink Reply by Luis Fraguada on October 11, 2010 at 1:53pm

can we see the resulting image?

Permalink Reply by Toussaint Jimenez Rojas on February 3, 2012 at 8:50pm

can you share the result ?

Permalink Reply by Daniel Piker on February 10, 2012 at 1:36pm

The definition I posted here:

http://www.grasshopper3d.com/group/hoopsnake/forum/topics/lloyds-al...

distributes points according to an image and smooths them.

and Andrew Heumann has been doing some very nice work with hatching and image density

Permalink Reply by Erik Lander on November 14, 2012 at 6:02pm

what happened to the idea of stippling?

Permalink Reply by Felipe Romero on December 12, 2012 at 10:50pm

Hi Alex

i little late but id really like to see your definition.

I have created a simple definition, i think it could work

Permalink Reply by machinehistories on May 11, 2013 at 6:58pm

this file works ok graphically stippling_works.gh

Permalink Reply by Vsevolod Kondratiev-Popov on July 23, 2015 at 11:02am

Hi Felipe,

I know it's been a while, but if you still have that definition handy, could you post it please? Thanks very much!

Permalink Reply by Erik Lander on February 4, 2019 at 11:29pm

i'm finally back on this issue, yet the world hasn't done much to solve it in many years; wtf seriously...

Permalink Reply by Erik Lander on February 4, 2019 at 11:30pm

we need this to be solved in true 3d , otherwise we'll be wasting time, unless all you have is an image, but thats a different issue imo

Permalink Reply by Erik Lander on February 4, 2019 at 11:31pm

we need a non-realistic rendering tool that can halftone shade and shadows with different patterns and shapes imo

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