wkcn commented on issue #9939: add multi proposal operator (cpu version) and fix the bug in proposal op (gpu version) URL: https://github.com/apache/incubator-mxnet/pull/9939#issuecomment-370320488 For the cpu/gpu consistency, it's interesting that the number of valid anchors in the CPU implementation and the GPU implementation may be different. The reason is that the float precision in CPU's and GPU's is different. The size of some anchors may be near the margin of the minimal valid anchor or the maximal valid anchor. The margin of the minimal valid anchor: https://github.com/wkcn/incubator-mxnet/blob/add_multi_proposal_cpu_version/src/operator/contrib/multi_proposal.cc#L159 The margin of the maximal valid anchor. https://github.com/wkcn/incubator-mxnet/blob/add_multi_proposal_cpu_version/src/operator/contrib/multi_proposal.cc#L89 I want to create testing sample to avoid these margins.
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