An apparatus for drawing an image on a thermal medium includes an overlapped part removing unit configured to detect an overlapped part between strokes or stroke groups forming a character to be drawn to remove the detected overlapped part, a dissipation liability information attaching unit configured to attach dissipation liability information to one or more of the strokes or one or more of the stroke groups grouping continuous strokes, and a stroke excluding unit configured to exclude the strokes or the stroke groups to which the dissipation liability information is attached such that the overlapped part is not removed from the excluded strokes or the excluded stroke groups when the overlapped part removing unit removes the overlapped part between the strokes or the stroke groups.