20180123 - AI Denoise Fail
Let take latest optimized numbers from this
Their optimized version would be 20 ms/frame for a 4K denoise. So at 30 Hz you'd have only 13.3 ms left to render something.
- Was 20 ms/frame at 1080p on NV's TitanV (or V100)
- Is now 5 ms/frame at 1080p
Now lets look at TitanV's peak capacity in 5 ms divided by 1080p pixels.
- 1574 bytes/pixel
- 1123 texture fetches/pixel
- 35926 32-bit flops/pixel
Fairly obvious from those numbers that the costs are astronomically high,
and that existing methods of temporal noise reduction are orders of magnitude faster.