关于上采样

[kaigelee]

您好，非常感谢您的分享，我想请问您，
x_seg_up = F.interpolate(x_seg, size=input.size()[2:], mode='bilinear', align_corners=True)
x_seg_up = F.interpolate(x_seg_up,size=[2*i for i in input.size()[2:]], mode='bilinear', align_corners=True)
这里为什么要上采样两次，而不是直接一次上采样到原始大小呢？

[Dootmaan]

Hi @kaigelee thank you for your question.
The code is written in this way to correspond to the description of DSRL paper that they added a simple 2x upsampling layer at the end of the network. The first line of upsampling operation is in the original code of Deeplab v3+ and I just leave it as it was. Of course you can directly replace these two lines with a simple 4x upsampling and it makes no difference.