A distance measuring unit measures a distance from a picked-up image by an image pickup unit to a tip portion of a finger. When the measured distance is less than a reference distance, a CPU displays an identification mark at a position corresponding to the finger on a display image, and takes in a locus of the finger as a handwritten character/figure. When the measured distance is the reference distance or more, the CPU hides the identification mark, and does not take in the locus of the finger as the handwritten character/figure.