| 摘要 |
A method for estimating pixel intensity includes generating a plurality of bidirectional paths extending between a light source and a measurement point, whereby the measurement point represents a pixel within the image. Each bidirectional path includes a light subpath portion extending from the light source and an eye subpath portion extending from the view point and coupled to the light subpath. Each light subpath is characterized by a number of vertices included therein, and similarly, each eye subpath is characterized by a number of vertices included therein. The plurality of bidirectional paths are sorted into separation populations, whereby each population includes bidirectional paths constructed from eye subpaths having a common number of vertices, and light subpaths having a common number of vertices. An intensity contribution is computed for each of the individual populations, and the intensity contributions are summed over all populations to estimate the intensity of the pixel.
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