Patent ID: 7159787
Filing Date: 2007-01-09
Classification: G11B,H04N

Abstract:
1. A method for storing data comprising the steps of: providing a sheet of media; printing a raw data pixel on said sheet of media, said raw data pixel including at least one color printed at a specific density and a color such that said raw data pixel represents a data point: printing an associated compensated data pixel on said sheet of media, said compensated data pixel including at least one color printed at a specific density, wherein said color and density of said compensated data pixel are related to the color and density of the associated raw data pixel by a predefined relationship; repeating said first and second printing steps until the desired data is stored on said sheet of media; and wherein each raw and compensated data pixel is printed at one of four discreet density levels, wherein a second density level has a higher density than a first density level, a third density level has a higher density than said second density level, and a fourth density level has a higher density than said third density level, and wherein when said raw data pixel is printed at said first density level, the associated compensated data pixel is printed at said third density level, and wherein when said raw data pixel is printed at said second density level, the associated compensated data pixel is printed at said fourth density level, and wherein when said raw data pixel is printed at said third density level, the associated compensated data pixel is printed at said first density level, and wherein when said raw data pixel is printed at said fourth density level, the associated compensated data pixel is printed at said second density level.