NVIDIA Corporation
Reducing noise during rendering by performing parallel path space filtering utilizing hashing

Abstract:

A method, computer readable medium, and system are disclosed for reducing noise during a rendering of a scene by sharing information that is spatially close through path space filtering. A vertex of a light transport path is selected, and one or more features of the selected vertex are quantized. A first hash is calculated based on the one or more quantized features of the selected vertex, and a collision resolution is performed within a hash table. A contribution of the light transport path at the selected vertex is accumulated to the hash table, and a counter is incremented in response to adding the contribution of the light transport path at the selected vertex to the hash table. An average contribution of the light transport path is then calculated, utilizing the counter.