Introduction - If you have any usage issues, please Google them yourself
SPLITMERGE Segment an image using a split-and-merge algorithm.
G = SPLITMERGE(F, MINDIM, @PREDICATE) segments image F by using a
split-and-merge approach based on quadtree decomposition. MINDIM
(a positive integer power of 2) specifies the minimum dimension
of the quadtree regions (subimages) allowed. If necessary, the
program pads the input image with zeros to the nearest square
size that is an integer power of 2. This guarantees that the
algorithm used in the quadtree decomposition will be able to
split the image down to blocks of size 1-by-1. The result is
cropped back to the original size of the input image. In the
output, G, each connected region is labeled with a different
integer.