Patent ID: 7982932

Claim:
A hologram decoding apparatus comprising: a light receiving unit including an imaging device that receives a reproduced image obtained by reading an encoded image from a hologram recording medium in which a Fourier transform image of the encoded image having n pixels representing digital information is recorded, wherein n is an integer of 2 or more; the imaging device outputs the reproduced image having k resolution pixel numbers; and k is an integer more than n; a storing unit that stores a plurality of decoding patterns and digital information corresponding to the decoding patterns, wherein each decoding pattern has m pixels, and k≧m>n; and a decoding unit that refers to the decoding patterns stored in the storing unit to specify one of the decoding patterns which corresponds to the reproduced image, wherein the decoding unit carries out a decoding process to decode the encoded image by setting the digital information corresponding to the specified decoding pattern as digital information of the reproduced image.