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YuwenXiong / py-R-FCN

R-FCN with joint training and python support
MIT License
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What is the benefit of using OHEM？ #11

Closed qianyeqiang closed 8 years ago

qianyeqiang commented 8 years ago

In readme, author said that OHEM need all rois to select the hard examples. What is the benefit of using OHEM specifically？And how the Efficiency and effectiveness will changed？ Thank you.

YuwenXiong commented 8 years ago

OHEM is cost-free, and we usually get 1 to 3 points gain by using it. The key idea is that we select hard examples rather than random sample examples. You could check https://arxiv.org/abs/1604.03540 for more details.

qianyeqiang commented 8 years ago

@Orpine Thank you for your reply.