Fig. 3From: Temporally coherent disparity maps using CRFs with fast 4D filteringSequential updates using a naive approach, proceeding from bottom right to top left. At each pixel i, we collect the contributions of all pixels that have not been updated yet (red) and already updated pixels (green) to implement the summation in Eq. 6. Because we have a smoothness term between all pairs of pixels, this requires O(N 2)Back to article page