Raster pixel detection

Hello Everyone,

I had a small doubt today in converting a raster image in to vector lines based on the detection of pixels. There is a possible way to convert it using Illustrator and Raster design, but just a thought if it could be done using grasshopper.

Many thanks in advance.

Replies to This Discussion

Permalink Reply by Daniel González Abalde on October 29, 2015 at 6:36am

Peacock has a Raster component to convert black and white images to closed curves.
http://www.food4rhino.com/project/peacock?etx

To do since color is a little more complicated.
My logic was: Making a mesh from the image and the resolution you want. For each point in the mesh, selecting the corresponding pixel, and filter following some method (brightness, hue...). Those who have been discarded corresponds to the vertices you have to remove of the mesh and then pick the naked edges of the mesh, and you soften the curve.
This method is very slow and depends on the resolution of the image, but it works.

Permalink Reply by Raja on October 29, 2015 at 7:48am

Hi Daniel,

Thanks for your reply. I will give a try with peacock plugin.

I didn't get the logic of yours in making the mesh. For instance should i import the image in to rhino and place the points manually then take it to grasshopper to convert it to mesh? Then the further steps of which you suggested of filtering and picking naked edges from mesh to soften or interpolate the curve ? Is it right?

Or is there way to filter the image in Grasshopper and then convert the pixel to points and then manipulate them directly in it ?

Permalink Reply by Daniel González Abalde on October 29, 2015 at 8:41am

Well, for simplicity, I meant this, as a basic example, where you have the steps.