I want to visualize the offset of the deformable convolution with kernel size 3*3.
So It’s essential for me to know what’s the exact meaning of these channels.
I write down something possible here:
upper-left: ul
upper-right: ur
bottom-left: bl
bottom-right: br
up: u
bottom: b
right: r
left: l
center: c


offset: 
delta_ul_x, delta_ul_y, delta_u_x, delta_u_y, delta_ur_x, delta_ur_y;
delta_l_x, delta_l_y, delta_c_x, delta_c_y, delta_r_x, delta_r_y;
delta_bl_x, delta_bl_y, delta_b_x, delta_b_y, delta_br_x, delta_br_y;