Change-Id: I1d2db53129dc6ec068093ad1e5fc0d94110473b3
Compares the sum of differences between the input block and the averaged block. If they differ too much the block will not be filtered. Negligible perfomance hit. Change-Id: Ib1c31a265efd4d100b3abc4a1ea6675038c8ddde
Faster version of denoiser, cut cost by 1.7x for C path, by 3.3x for SSE2 path. Change-Id: I154786308550763bc0e3497e5fa5bfd1ce651beb