True 4D Image Denoising on the GPU

Table 4

Processing times for lowpass filtering the 10 tensor components, calculating 𝛾 and mapping the structure tensor to the control tensor for the different implementations. The processing times for the GPU do not include the time it takes to transfer the data to and from the GPU.

Data size	CPU	GPU	GPU speedup
256×256×223×20	42 s	1.0 s	42
512×512×445×20	292 s	7.3 s	40