Convex hull area in pixels

1. What is convex hull in image processing?
2. Is convex hull a polygon?
3. Is convex hull bounded?

What is convex hull in image processing?

Convex Hull. • A region A is convex if a straight line joining any two points in A falls within A. • A convex hull, H, of a set S is the smallest convex set containing S.

Is convex hull a polygon?

In the general case the convex hull is a Polygon. The convex hull of two or more collinear points is a two-point LineString.

Is convex hull bounded?

The convex hull of a finite set of points in the plane is a bounded, closed, convex polygon.