When you check above apps, they get a picture and let you color them. At first I thought they are triangulated by an algorithm but when I checked closely they are not all composed of triangles. There are also 4 side polygons. Do you have any idea how these triangulations are made? Are they done by a triangulation procedure by a computer or is there an artist behind it? I mean it should not be a triangulation procedure because there are shapes other than triangles in them.
Note: Also when you get further in game you get reallly complex shapes. I also wonder how these are divided too. I klnow triangulation procedure but this should be different procedure because not all shapes are triangle.
The image outlines do look quite a lot like Delaunay triangulation and you could use it (or something similar) to triangulate/mesh your point clouds. There are also quite a few applications and plugins (for Illustrator etc.) that allow you to do that kind of “low-poly” look.
I think it’s pretty certain that if someone cares a bit about aesthetics of an app, they have manually tweaked the artwork. That’s probably the case with the app that you linked to. Unless there’s thousands of images in that app/game, I’d guess it’s partially or mostly manual work.
Of course it’s possible, but I’d say it’s unlikely that one is. If you had an app that allowed users to upload their own photos to generate that kind of triangulated images, it would have to have a feature to programmatically create those shapes. Otherwise, from a business perspective, what point there would be to waste time on algorithm, if you just have a set of images (like 50-100, for example?). It would be much cheaper to employ some artists to produce those images and have the product ready. Automation becomes a sensible option when there’s lots of things to process.
I guess you have to try out if you want to see if it’s possible to achieve good enough quality in the time budget you have?
