Fig. 11
The convolution operations in SSD calculation and feature aggregation. a SSC feature map is calculated in the manner of convolution operations. Pi is the center patch of the image, Pj is a neighborhood patch of Pi. Pi would overlap Pj by shifting with \(\overrightarrow {L}\). This operation translates the computation of SSD to a voxel-wise squared difference. b Feature aggregation with a convolution operation. The kernels are designed according to the spatial distribution of voxels in bins