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. Author manuscript; available in PMC: 2021 Apr 2.
Published in final edited form as: IEEE Trans Med Imaging. 2021 Apr 1;40(4):1217–1228. doi: 10.1109/TMI.2021.3050072

Fig. 6.

Fig. 6.

Spherical pooling operation using 1-ring filter. The input surface with i-th subdivision is pooled to (i-1)-th subdivision. The feature map channel number D is unchanged.