发明名称 |
Data playback method and device |
摘要 |
<p>There is provided a data playback method including: acquiring first image data by illuminating reference light for reading onto an optical recording medium on which a hologram has been recorded by Fourier transforming and simultaneously illuminating reference light and signal light expressing digital data as a light-and-dark image, and detecting an inverse Fourier-transform image of diffracted light which is diffracted by the recorded hologram, acquiring second image data, which is a reversal image of the first image data, by generating combined light by combining the diffracted light and a dc component whose phase is different than a phase of a dc component of the signal light included in the diffracted light, and detecting an inverse Fourier-transform image of the combined light; and computing a difference in luminance for each pixel of the light-and-dark image, by carrying out computing processing by using the first and second image data.</p> |
申请公布号 |
EP1804239(B1) |
申请公布日期 |
2011.03.23 |
申请号 |
EP20060116991 |
申请日期 |
2006.07.11 |
申请人 |
FUJI XEROX CO., LTD. |
发明人 |
YASUDA, SHIN;OGASAWARA, YASUHIRO;MINABE, JIRO;KAWANO, KATSUNORI;HAGA, KOICHI;HAYASHI, KAZUHIRO;YOSHIZAWA, HISAE;FURUKI, MAKOTO |
分类号 |
G11B7/0065;G03H1/22;G06T5/50;G11B7/005 |
主分类号 |
G11B7/0065 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|