6. The method according to claim 3 , wherein the plurality of font features includes concave curvature features and convex curvature features.
6. The method according to claim 3 , wherein the plurality of font features includes concave curvature features and convex curvature features. 7. The method according to claim 6 , wherein the plurality of font features includes chain code direction features, direction length features, and a smallest black component.