Convex Hulls part 3

February 18, 2018 mikefc

Messing around with `chull`

As mentioned yesterday, I’m using chull() to create some stuff.

The basic scheme is:

Generate a large number of points somehow
Repeat the following until done:
- Take a small subset of the points
- Draw the convex hull around them.

Extra filtering was done to reject some of the generated convex hulls, i.e.

Reject those with a large area, as I wanted to use smaller, local hulls
Reject those with “bad” circularity. i.e. when the ratio of convex hull area to bounding box area was too low

Here’s what happens when a recognizable image is used as a point source.