| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image positioning method for holographic data storage. <P>SOLUTION: An image positioning method for holographic data storage utilizes a reference gray scale frame to capture a regional image used as a captured image with the size equal to that of the gray scale frame from a received gray scale image. The reference gray scale frame is compared with each captured image to obtain a plurality of values and construct a 2D proto-matrix. The 2D proto-matrix is transformed into a 2D matrix by letting the values smaller than zero be zero. A positioning matrix is obtained using a dimension and the reference gray scale frame equal to or smaller than the 2D matrix and a capture matrix. A greatest value in the central region of the 2D matrix is found to function as a positioning value. The positioning value is used to find a corresponding position on the gray scale image and to set the position as a positioning point position, so that a deformed or out-of-focus gray scale image can be reproduced. <P>COPYRIGHT: (C)2013,JPO&INPIT |
