Pretrain feature extractor

[yjhong89]

Dear author.

I am YJHong and researching on vertex refinement.

Thanks for your great works!

Since the code is not released yet, I have few questions about implementation.

1. How pretrain feature extractor (UNet with ResNet34 backbone) ?
   • which datasets and loss function ?
   • is it freezed when training V2V ?
2. How finetune to new datasets (case of generalization to CoMA dataset)
   • Finetune whole architecture including global and local stage ?
   • If it were true, how set ground truth vertices for each stage ? (The number of CoMA dataset vertices is different to ToFu)

Thank you! YJHong.