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MobileNet-v2-caffe

MobileNet-v2 experimental network description for caffe.

Update 2018-08-18

1. Add other Mobilenet-v2 variants
2. Suggestion: cudnn v7 has supported depthwise 3x3 when group == input_channel, you may speed up your training process by using the latest cudnn v7.

Update

1. Google has released a series of mobilenet-v2 models. So reference pretrained model from tensorflow/model repository.
2. MobileNet-V2 has accepted by CVPR 2018. The latest ilsvrc12 top1 accuracy is 72.0%.
3. According to google official model, mobilenet-v2 downsampled feature map early.
4. shortcuts are placed except the first inverted residual bottleneck sequence.

Note

There are some unclear details about the network architechture.

1. bottleneck sequence 5's input size doesn't match its prior sequence's stride.
2. how to deal with shortcuts or residual when the input channel and ouptut chanel are not the same. (Currently, we add shortcuts for all bottlenecks in the bottleneck sequence except the first one.)
3. The paper says there are 19 bottlenecks, while there only 17 bottlene in Table 2.

Suggestion

1. Strongly recommend that reimplement the paper use mxnet, pytorch, tensorflow, other than caffe, since there are optimized depthwise conv layer.
2. Don't forget set the weight decay 4e-5.
3. inception data augmentation helps.