!FINALLY! I'm very happy with this. The recognition is much better than the other similar things I've tried. By my limited testing, it seems to be accounting for the image as a whole and not the order of strokes, so should work for uploads.

A couple desired improvements:

-Allow uploading of images

-add an eraser/undo

-some Greek/Hebrew letters (aleph, beth, xi... ) aren't being recognized despite my tries... they've very similar to X's, equivilant, and ='s. Beth really should work, but isn't.