Patent ID: 7477421
Filing Date: 2009-01-13
Classification: H04N

Abstract:
1. A method for mapping a pixel outside a halftone cell to a point inside the halftone cell, comprising: determining the size of a rectangle which is tiled exactly by the halftone cell, wherein the halftone cell is defined by two rectangular shapes, the first rectangular shape having a width X using a threshold array to render the point when the size of the rectangle size permits; and calculating a plurality of potential solutions for rendering the pixel when the size of the rectangle is too large for a threshold array and selecting one of the plurality of potential solutions based on the locations of the plurality of potential solutions with respect to the halftone cell, wherein calculating the plurality of potential solutions includes calculating a starting point of an enclosing tile in Cartesian coordinates having an x component and a y component, wherein calculating four coefficients wherein