Fills a 4-connected GRAY mesh starting at the given coordinates with the given color.
Takes a segmented image and fills any 'small' holes:
1) All holes are filled with gray.
Searches [preorder] this, before (iteratively), and after (iteratively) for the
given node.
Plug-in for ImageJ that attempts to automatically perform
specific segmentation designed for vascular cells grown
on a Matrigel assay by Dr.