Denoising dynamically ray-traced scenes using historical pixel values

A system, comprising:

• a temporal accumulator system to temporally accumulate pixel data associated with a plurality of history buffers for a frame and provide the temporally accumulated pixel data, wherein the plurality of history buffers comprising a responsive history buffer and a normal history buffer, the responsive history buffer comprises a first pixel value at a pixel location of the frame, and the normal history buffer comprises a second pixel value at the pixel location of the frame;
• a history system to:
• receive the temporally accumulated pixel data corresponding to the first pixel value and the second pixel value;
• determine at least one difference of the first pixel value and the second pixel value;
• update at least one of the first pixel value and the second pixel value based on the at least one difference and a tuning parameter;
• and
• a spatial filterer system to apply one or more spatial filters to the updated at least one of the first pixel value and the second pixel value and output the updated and spatially filtered at least one of the first pixel value and the second pixel value.

A system, comprising:

• an application programming interface (API) to interface with one or more applications executed using one or more circuits, the API to cause the one or more circuits to:
• determine a plurality of history buffers for a frame, the plurality of history buffers comprising a responsive history buffer and a normal history buffer, the responsive history buffer comprises a first pixel value at a pixel location of the frame, and the normal history buffer comprises a second pixel value at the pixel location of the frame;
• determine at least one difference between the first pixel value of the responsive history buffer and the second pixel value of the normal history buffer;
• and
• update at least one of the first pixel value or the second pixel value based on the at least one difference and a tuning parameter.