Detect the shape of drawing objects within Camera boundary (classes - line, triangle, rectangle, pentagon, Hexagon, circle) and draw in Augmented Reality. Also mention the shape type along with drawing.
Like : "L" - Line, "T" - Triangle , "R" - Rectangle, "C" - Circle, "P" - Pentagon, "H" - Hexagon
-- White Background are preferable. like : Pen and paper, white-boarding etc.