[jira] [Created] (MXNET-40) add multi proposal operator (cpu version) and fix the bug in proposal op (gpu version)

["Kan Wu (JIRA)" <ji...@apache.org>]

Kan Wu created MXNET-40:
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             Summary: add multi proposal operator (cpu version) and fix the bug in proposal op (gpu version)
                 Key: MXNET-40
                 URL: https://issues.apache.org/jira/browse/MXNET-40
             Project: Apache MXNet
          Issue Type: Improvement
            Reporter: Kan Wu
            Assignee: Chris Olivier


The multi_proposal operator ({{mxnet.sym.contrib.MultiProposal}}, CPU version) is not implemented before.
I wrote the code about it.

And I found there was a bug in _proposal.cu_ and _multi_proposal.cu_.
The {{batch_size}} of the output of _Proposal_ and _MultiProposal_ are both {{param_.rpn_post_nms_top_n}}.
When {{count_anchors < param_.rpn_post_nms_top_n}}, the variable {{rpn_post_nms_top_n}} will be {{count_anchors}}, which is less than {{param_.rpn_post_nms_top_n}}.
[https://github.com/apache/incubator-mxnet/blob/master/src/operator/contrib/proposal.cu#L438]

It will cause the problem that the output whose index is larger than {{rpn_post_nms_top_n}} will be _not assigned_.



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