Fit polyshape to objects in image

Given a 2D binary or label image of a number of objects, returns a "best-fit" polyshape to the boundaries of the objects.

The routine bwlpolyshape() in this submission, takes as input an image containing a number of objects. The routine returns, for each object, a polyshape representing the code's idea of a minimal, best-fitting polygon to the objects' boundaries.

The input image can be a binary image, in which case each contiguous region represents an object:

subplot(1,2,1);  imshow(BW,[]);
subplot(1,2,2);  pgons=bwlpolyshape(BW, Visualize=true)

For images containing discontinuous objects, a label map can be used: