| 摘要 |
<p>There has been the problem that, in a hologram memory, there may exist luminance non-uniformity within a page as a result of diffraction intensity non-uniformity within a diffraction image, caused by a defect in a recording medium or optics. In the present invention, when reproducing two-dimensional page data from an optical information recording medium, the reproduced two-dimensional page data is partitioned, for each unit having a misalignment detection-use marker embedded in the page data, into a plurality of areas, and in the group of partitioned two-dimensional areas, AGC processing is individually performed using the luminance information of the markers.</p> |
