Gray level weighting centroid method for holographic data storage
US8290254B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2010 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Jan 18, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2504
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A gray level weighting centroid method for holographic data storage is disclosed. Firstly, a first gray level image having a plurality of blocks is received. Then, a convolution calculation is performed on a weight matrix and the image, so as to obtain a second gray level image having a plurality of blocks each having a gray level value. The gray level values are divided into a bright gray level value and a dark gray level value by a threshold value, so as to convert the second gray level image into a thresholding image and find the positions of the borders of the blocks corresponding to the bright gray level value. Next, the blocks surrounded by the positions of the borders and respectively used as a centroid block are found by making the positions of the borders correspond to the first gray level image. Finally, the centroid block is calculated to obtain a centroid point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.