1. An image processing apparatus comprising: a CPU which is configured to: execute line drawing conversion of a source image; form a plurality of divisional images having geometrical shapes, by connecting lines of a line drawing obtained by the line drawing conversion; color, in colors, areas in the respective formed divisional images; and separate specific images including at least a main subject image from the source image, wherein the CPU is configured to execute line drawing conversion of the specific images separated from the source image.