Patent ID: 7570838
Filing Date: 2009-08-04
Classification: G11B

Abstract:
1. An image correction method for compensating for misalignment of pixels at the time of reproduction in a Holographic Digital Data Storage (HDDS) system, comprising the steps of: a) detecting a stored page-based image using a Charge Coupled Device (CCD) through a one-to-one (1:1) pixel matching between data pixels and CCD detector pixels at the time of reproduction; b) calculating, in case the misalignment of pixels occurs during the 1:1 pixel matching, an amount of the misalignment δ(0≦δ<1) between a corresponding data pixel and a corresponding CCD detector pixel; c) calculating an interference influence of a neighboring pixel on the corresponding CCD detector pixel based on the calculated amount of the misalignment, and correcting image data of the CCD detector pixel; and d) compensating for a misalignment influence in accordance with the amount of the misalignment, and correcting the image data of the CCD detector pixel wherein the step c) includes the steps of: c1) calculating an interference influence of a right neighboring pixel on the corresponding CCD detector pixel when the amount of the misalignment exceeds 0.5 pixel, and correcting the image data of the CCD detector pixel: and c2) calculating an interference influence of a left neighboring pixel on the corresponding CCD detector pixel when the amount of the misalignment is equal to or less than 0.5 pixel, and correcting the image data of the CCD detector pixel.