Any hints as to what strategy you used?

The results look great!

AB :

Mesh heightmap from image > slice the mesh with xy plane > delaunay mesh from section polylines > extract face centers > use image sampler again with the center points this time > cull those which are not dark enough > proximity 2d(2 neighbors) > create lines to neighbors with 1/2 length (faster than removing the duplicates) > join all the lines > smooth them somehow (i used 3 steps of laplacian smoothing made with proximity)

This is of course a rough explanation, you'll need to set all the values properly.

Great, Thanks for the detailed workflow... I will give it a shot and see goes. Thanks again.

Hi,

I was wondering if you are willing to share this file. It would be really helpful.

hi @Mateusz your work is really great! I am looking for this script to translate my hand sketches into vectors and print it off. Would you mind sharing your grasshopper file? will really appreciate!

Now it's easier to create something like this, since there is a drawing app for iPad and iPhone and a lot of other software that provide simple and understandable functionality for creating graphics. Now almost every designer uses at least 2-3 tools for their work.