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Device dependent rendering

  • US 7,646,387 B2
  • Filed: 04/11/2006
  • Issued: 01/12/2010
  • Est. Priority Date: 08/19/1999
  • Status: Active Grant
First Claim
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1. A computer-implemented method for processing a character for display on a raster output device where the output device has a resolution and a set of pixels defining a device grid, the method comprising:

  • receiving a character having a plurality of stems, each stem having a center, the center of each stem having an ideal location for display;

    determining, in a computer system, a plurality of alignment grids for the character on the device grid where each alignment grid is offset from another alignment grid by at least one sub pixel on the device grid and where each alignment grid determines a grid-imposed location for each stem;

    computing, in the computer system, an error for each alignment grid where the error is computed based on differences between the ideal locations for the stem centers and the grid-imposed locations of the stem centers;

    selecting a best alignment grid from the plurality of alignment grids, the best alignment grid having a smallest error; and

    rendering the character on the output device based on the best alignment grid.

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