Hello,
1. I don't understand how we get from the convex hull to the visual hull [slide 19 from the Shape from Contrours]. (what operations need to be taken to go from one state to the other and why). Also, I found that the visuall hull is directly obtained as the intersection of the silhouettes' cones on the Wikipedia article. [https://en.wikipedia.org/wiki/Visual_hull]
Could you please clarify that? Thanks in advance!