OHEM：Training Region-based Object Detectors with Online Hard Example Mining

论文：Training Region-based Object Detectors with Online Hard Example Mining official code - caffe：https://github.com/abhi2610/ohem 1. hard example 顾名思义，难例，即检测困难的正样本，与 easy example相对，一般指训练过程中误分的样本。 2. 核心

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