Image sampler point density

I am new to and have been experimenting with the image sampler
component, I would like to be able to create what should basically look
like a stippled pen and ink drawing with a sort of point density
field. Essentially, I would like darker colors in the sampled image to
produce a field of densely populated points whereas the lighter colors
to be less densely populated with points. Any ideas?

Tags: denisty, field, image, point, populate, sampler, stipple

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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

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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