Joshua Z. Zhang

@TonyTangYu I mean mxnet version is 1.1 not 0.11

@TonyTangYu ``` pip install mxnet==1.2.0 --upgrade ```

Thank you for the comments! If you have update to make this repo better, I'd be super happy to cooperate with you if you are willing to submit a PR,...

make sure you have correct path pointing to the image data folder

which network, if it's vgg then yes, it is broken after last refactor

Please follow up [GluonCV](https://gluon-cv.mxnet.io/model_zoo/index.html) for the pre-trained models. Mobilenet v2 SSD is missing, but you can expect more models coming.

given a gluon `net`, you can convert it to symbol very quickly: ``` import gluoncv as gcv import mxnet as mx net = gcv.model_zoo.get_model('ssd_512_mobilenet1.0_voc', pretrained=True) sym = net(mx.sym.var('data')) # visualize...

You can send a feature request to GluonCV, we can take it into consideration in the roadmap!

you can set lr_mult of batchnorm beta term to 0 to fix the beta, which is initialized as 0.

@titikid You can leave gamma unfixed or not, depending your result, but I would prefer leave it free.