Curve on an Image into Rhino through Image Sampler??

Hi, I'm working on a project and wondering if it's possible to have a curve on an image, drawn in photoshop for example, turned into an actual curve in Rhino, through grasshopper.

It may make sense from looking at the attached images, but currently I'm starting with a drawn image of a line, generating a bunch of points and using Image Sampler to see if those points are on the line. That gets me the desired shape made out of points, but I'm not sure what would be the next way to go.

I though about using Kangaroo to pull another curve towards those points, hopfully having the curve take its general shape, but I believe this would create the possibility of the curve folding back on itself or other undesired effects. Anybody have any ideas on what would be the best direction to go??

Thanks!

Attachments:

Untitled-2.jpg, 412 KB
Untitled-3.jpg, 203 KB
Untitled-1.jpg, 189 KB

Replies to This Discussion

Permalink Reply by Danny Boyes on June 30, 2014 at 3:29am

Hi Matt,

Do you want each strand curve to be represented or one averaged curve, like below?

Permalink Reply by Danny Boyes on June 30, 2014 at 3:33am

Ning misbehaving again....

Attachments:

RasterToVector.gh, 105 KB

Permalink Reply by Matt Stewart on June 30, 2014 at 6:45am

That's brilliant. Thanks!

At this stage an averaged one is what I'm looking for. But for curiosity sake, how would you go an try to represent each strand. Don't go ahead and do it, but in theory??

Permalink Reply by Danny Boyes on June 30, 2014 at 7:08am

I think I would increase the resolution of the sampling points and then try and identify the lines from a Voronoi Cell that were representative of the intended curve and then simplify them. See Image