I want to take a silhouette image (black hand on white background) and make a 3d "slice" that has thickness 1 and the outline of the hand. Is there a simple way to extract the black pixels, find the outline and then give it some thickness?
Ideally, I want to do this with a video of a hand moving and build up a stack of slices into a column, so I want to keep the vertex count manageable. I did think about making a 1x1x1 box for every black pixel, but the vertex count gets huge very quickly (8 for every black pixel rather than finding an outline).
Alternatively, creating a 3D mesh that connects the first outline with the second outline with the third outline directly into a water-tight, 3D-printable mesh would be the holy grail for me, but I think this is too hard a problem.
If anyone knows of some similar projects or useful libraries, please let me know.