An information reception device comprising an imaging portion; a light
reception portion for light reception of optional information subjected
to optical modulation; a specification portion for specifying an optical
modulation region contained in a capture angle of the imaging portion; a
decoding portion for controlling the light reception portion in order to
carry out light reception of the optical modulation region specified by
the specification portion and decoding the optional information from the
optical modulation content contained in the region; and a reproduction
portion for reproducing the optional information decoded by the decoding
portion. By acquiring a region essential for detection of optical
modulation, acceleration of the information decoding process is achieved.
Furthermore, position adjustment of the optical modulation region is
easily accomplished.