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Spatial data encoding and decoding

  • US 7,974,438 B2
  • Filed: 12/11/2007
  • Issued: 07/05/2011
  • Est. Priority Date: 12/11/2006
  • Status: Active Grant
First Claim
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1. A method comprising:

  • designating a tile within a source frame, the tile including a plurality of available pixels;

    dividing the tile into at least one bit area, a particular bit area of the at least one bit area capable of being encoded with one or more message bits;

    accessing a modulation pattern including a plurality of modulation pattern values;

    accessing a particular message bit value of a message;

    performing a statistical property calculation on a pixel variable value of the plurality of available pixels within the tile; and

    shifting a pixel variable value of a plurality of pixels in the particular bit area of a target frame to encode a particular message bit of the one or more message bits, a particular pixel variable value of a particular pixel of the plurality of pixels being shifted by a shift value, the shift value being in accordance with the statistical property calculation, the particular message bit value, and a particular modulation pattern value of the plurality of modulation pattern values for the particular pixel within the particular bit area.

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