HOLOGRAM REPRODUCED IMAGE POSITION DETECTING METHOD AND HOLOGRAM DEVICE

摘要

Provided is a hologram reproduced image position detecting method used in a hologram device. The hologram device forms an image from the light reproduced from a recording medium containing a data page including a marker and a data region displayed on a spatial light modulator, on an image sensor having a greater number of pixels than the spatial light modulator, so as to obtain a reproduced image of a data page and reproduce the data page. The method includes: a step for storing in advance, a template image interpolated/enlarged by a marker; a step for oversampling a reproduced image of the data page by the image sensor; and a step for performing a template matching process by using a detected image and a template image so as to detect a marker position upon recording.