Joshua Z. Zhang

The order is swapped by transpose. The reason to use it in reverse order is because anchors are of batch size 1, and by doing this we can save batch_size...

See definition of SigmoidBinaryCE: https://mxnet.incubator.apache.org/api/python/gluon/loss.html?highlight=sigmoid#mxnet.gluon.loss.SigmoidBinaryCrossEntropyLoss tldr; CrossEntropy != multi class softmax cross entropy

For mxnet only problems, can you post it on https://github.com/apache/incubator-mxnet/issues?

see https://github.com/dmlc/gluon-cv/pull/186 whether adding 1px is still debating and not valid if box is normalized, but I've added an option to allow such convention.

Probably will add in the next release.

Thanks for spotting.

@leezu what type of issue did you hit with sacred? I have no preference on the configuration system itself, either sacred or yacs will do the job. Currently I am...

Not sure if sacred has worked around the magics, but for the configs itself is a standard `dict` which can be modified by user anytime

try ``` yum install -y ffmpeg-devel # or yum install -y libavcodec-devel libavformat-devel libavutil-devel libavdevice-devel libavfilter-devel ```

@chenj133 Did you run `yum update` before these commands?