Denoising dynamically ray-traced scenes using temporal and spatial variances of historical pixel values

A system, comprising:

• one or more processing units to implement:
• a temporal accumulator system to temporarily accumulate pixel data associated with at least one history buffer for a frame and provide the temporarily accumulated pixel data, the at least one history buffer comprising an accumulated pixel value at a pixel location of the frame;
• a history system to receive the temporarily accumulated pixel data corresponding to the accumulated pixel value, determine a pixel value range based at least on a spatial component in a spatial domain and a temporal component in a temporal domain, determine an amount of historical reset of the at least one history buffer based at least on the accumulated pixel value at the pixel location, a current pixel value of input data at the pixel location of the frame, and the pixel value range, and update the accumulated pixel value based at least on the amount of historical reset;
• and
• a spatial filterer system to apply one or more spatial filters to the updated accumulated pixel value and output the updated and spatially filtered accumulated pixel value.

A system, comprising:

• an application programming interface (API) to interact with one or more applications executed using one or more circuits, the API to cause the one or more circuits to:
• determine at least one history buffer for a frame, the at least one history buffer comprising an accumulated pixel value at a pixel location of the frame;
• determine a spatial component of the accumulated pixel value at the pixel location based on a first spatial moment and a second spatial moment, wherein the first spatial moment comprises a mean of a set of accumulated pixel values within a spatial region comprising the pixel location in the at least one history buffer, and wherein the second spatial moment is a spatial variance corresponding to one or more changes in the set of accumulated pixel values within the spatial region in the at least one history buffer;
• determine a temporal component of the accumulated pixel value at the pixel location based on a first temporal moment and a second temporal moment, wherein the first temporal moment comprises the accumulated pixel value, and wherein the second temporal moment comprises a temporal variance corresponding to one or more changes in the accumulated pixel value at the pixel location over a plurality of history buffers;
• determine a pixel value range based at least on the spatial component in a spatial domain and the temporal component in a temporal domain;
• determine an amount of historical reset of the at least one history buffer based on at least one of:
• the accumulated pixel value at the pixel location of the at least one history buffer, a current pixel value of input data at the pixel location of the frame, or the pixel value range;
• and
• update the accumulated pixel value based at least on the amount of historical reset.