Spatial anti-aliasing for animation sequences with spatio-temporal filtering

Anti-aliasing is generally an expensive process because it requires super-sampling or sophisticated rendering. This paper presents a new type of anti-aliasing filter for animation sequences, the pixeltracing filter, that does not require any additional sample nor additional calculation in the rendering phase. The filter uses animation information to calculate correlation among the images, and sub-pixel information is extracted from the sequence based on the correlation. Theoretical studies prove that the filter becomes an ideal antialiasing filter when the filter size is infinite.