Is it cheating to use Image Sampler? I adapted this model posted three weeks ago to make peaks where the black spots are, then slice them with an adjustable height plane and cull unclosed curves. It can be refined in various ways…
Image_Sampler_2019Nov17a.gh (449.7 KB)
Due to a very old GH bug, the Image Sampler will likely be missing when you open this file, so you need to replace it using the image you posted. Note the “Color brightness” setting.
P.S. Image dimensions are 512 X 930 so 512 is the maximum on the ‘resolution’ slider. Turns out that the Boundary surface is incredibly slow at this resolution; eight minutes on my old laptop in R5. Otherwise, except for Brep | Plane (Sec, 40 sec.), it’s reasonably fast so I suggest disabling Boundary until you get the cross sections you like first.
