text: Title: The results of running demo.py create too many boxes.
  Body: I replaced the network among the codes in the Repo. (resnet101)
  Losses are decreasing normally.
  The results of running demo.py create too many boxes. Is it too early to judge / now iteration is 6000
  
  <img width="544" alt="스크린샷 2020-03-03 오전 2 41 37" src="https://user-images.githubusercontent.com/48986889/75702278-84ed2400-5cf8-11ea-8cae-4397ee5e814c.png">
  