explicit start/end points of baselines
While the current segmenter doesn't take these into account it's probably useful to encode and visually show the start and end point of each baseline, i.e. let the user draw the baseline in reading direction and keep that information. Currently, lines written on their top will be extracted with an incorrect orientation and having this data would make it possible a) for users to force correct orientation and b) incorporate this functionality to the segmenter down the line.