When the shapes are hand drawn, and the boundaries have gaps in them, heuristics are needed. Same if filling an object in a photo - where are the edges, exactl

When the shapes are hand drawn, and the boundaries have gaps in them, heuristics are needed. Same if filling an object in a photo - where are the edges, exactly? That kind of object recognition is familiar ML stuff. The pictures in this paper show quite a few examples of filling problems: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.655.5364&rep=rep1&type=pdf http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.655... I don't know about MS Office, specifically, though.