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Clustered principal components for precomputed radiance transfer

  • US 7,167,176 B2
  • Filed: 08/15/2003
  • Issued: 01/23/2007
  • Est. Priority Date: 08/15/2003
  • Status: Active Grant
First Claim
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1. A graphics processing method for illuminating a geometrical object, the method comprising:

  • compressing a quantity of per-vertex transfer matrices by, at least;

    partitioning the per-vertex matrices into a quantity of clusters fewer in number than the quantity of per-vertex matrices, andapproximating each cluster as an affine subspace with a dimensionality dependent on at least the cluster;

    computing a transfer matrix model for each cluster; and

    producing an exit radiance for each cluster by applying the transfer matrix model to at least one input parameter the exit radiance producing shading for rendering and presentation on a display.

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