How to use HARD_EXAMPLE in mxnet ssd?

[zt706]

Hi: I want to use HARD_EXAMPLE mining, what should I do? Does it only support MAX_NEGATIVE now?

[davsol]

Look at symbol/symbol_builder.py it calls the next function which is the answer for all your questions

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mx.contrib.symbol.MultiBoxTarget( *[anchor_boxes, label, cls_preds], overlap_threshold=.5,
ignore_label=-1, negative_mining_ratio=3, minimum_negative_samples=0,
negative_mining_thresh=.5, variances=(0.1, 0.1, 0.2, 0.2), name="multibox_target")

---

You can see the documentation here: http://mxnet.incubator.apache.org/api/python/symbol/contrib.html#mxnet.symbol.contrib.MultiBoxDetection