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Avoid hard example mining NMS when iou_threshold=1.0 #4874

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Avoid hard example mining NMS when iou_threshold=1.0 #4874

wants to merge 1 commit into from

Commits on Jul 24, 2018

  1. Avoid NMS when iou_threshold=1.0 

    When iou_threshold = 1.0, code will also do NMS but actually do nothing, as num_hard_examples == num_boxes. But this operation is very slow in CPU, and have a side effect on the train speed. So if iou_threshold = 1.0, we can simply skip the NMS operation.
    @irmowan
    irmowan authored Jul 24, 2018
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