上下采样函数--interpolate

参考链接：https://zhuanlan.zhihu.com/p/166323682

x = nn.functional.interpolate(x, scale_factor=8, mode='bilinear', align_corners=False)

solov2
kernel_feat = F.interpolate(kernel_feat, size=seg_num_grid, mode='bilinear') #上采样 成 [1, seg_num_grid, seg_num_grid]