Summed-area tables for texture mapping

Franklin C. Crow
1984 Computer graphics  
Texture-map computations can be made tractable through use of precalculated tables which allow computational costs independent of the texture density. The first example of this technique, the "mip" map, uses a set of tables containing successively lower-resolution representations filtered down from the discrete texture function. An alternative method using a single table of values representing the integral over the texture function rather than the function itself may yield superior results at
more » ... perior results at similar cost. The necessary algorithms to support the new technique are explained. Finally, the cost and performance of the new technique is compared to previous techniques.
doi:10.1145/964965.808600 fatcat:k42mas5qdnehzdz2dntsohkwci