METHOD FOR OPTIMALLY DETECTING FRAME ON CCD IMAGE IN A HDDS

摘要

An optimum frame detection method in an HDDS(Holographic Digital Data Storage) system is provided to be capable of exactly detecting a reference frame from a data image taken by a CCD(Charge-Coupled Device), thus holographic digital data of the data image is exactly decoded. A data image of page unit stored in a storage medium of an HDDS system is taken, and the taken image is converted into electric data(S200). A sum of pixel values of each line is obtained in row or column direction from the data image of the page unit of a CCD(S202). Values that divide a pixel sum of plural lines which are peripherally adjacent by a proportional constant are subtracted from a pixel sum of the current lines(S204). A line having a maximum value among the subtracted values is detected as a reference frame(S206,S208).