MMdnn

A comprehensive, cross-framework solution to convert, visualize and diagnosis deep neural network models. The "MM" in MMdnn stands for model management and "dnn" is an acronym for deep neural network.

Basically, it converts many DNN models that trained by one framework into others. The major features include:

• Model File Converter Converting DNN models between frameworks
• Model Code Snippet Generator Generating training or inference code snippet for frameworks
• Model Visualization Visualizing DNN network architecture and parameters for frameworks
• Model compatibility testing (On-going)

Installation

You can get stable version of MMdnn by

pip install https://github.com/Microsoft/MMdnn/releases/download/0.1.2/mmdnn-0.1.2-py2.py3-none-any.whl

or you can try the newest version by

pip install -U git+https://github.com/Microsoft/MMdnn.git@master

Features

Model Conversion

Across the industry and academia, there are a number of existing frameworks available for developers and researchers to design a model, where each framework has its own network structure definition and saving model format. The gaps between frameworks impede the inter-operation of the models.

We provide a model converter to help developers convert models between frameworks, through an intermediate representation format.

Support frameworks

[Note] You can click the links to get detail README of each framework

• Caffe
• Keras
• MXNet
• Tensorflow (Experimental) (Highly recommend you read the README of tensorflow firstly)
• Microsoft Cognitive Toolkit (CNTK) (Destination only)
• PyTorch (Destination only)
• CoreML (Experimental, Destination only)

Tested models

The model conversion between currently supported frameworks is tested on some ImageNet models.

Models	Caffe	Keras	Tensorflow	CNTK	MXNet	PyTorch	CoreML
Inception V1	√	√	√	√	√	x (No LRN)	√
Inception V3	×	√	√	√	√	√	√
Inception V4	√
ResNet V1 50	×	√	√	o	√	√	√
ResNet V2 152	√	√	√	√	√	√
VGG 19	√	√	√	√	√	√	√
MobileNet_v1	×	√	√	× (no DepthwiseConv)	×	×	√
Xception	×	√	√	× (no SeparableConv)	×	×
SqueezeNet	√	√	√	√	√	×
DenseNet		√	√	√
NASNet		√	√	× (no SeparableConv)
[ResNext]		√	√	√	√

On-going frameworks

• PyTorch (Source)
• CNTK (Source)
• Caffe2
• ONNX

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Model Visualization

You can use the MMdnn model visualizer and submit your IR json file to visualize your model.

Use the Keras "inception_v3" model as an example again.

1. Download the pre-trained models

python -m mmdnn.conversion.examples.keras.extract_model -n inception_v3

2. Convert the pre-trained model files into intermediate representation

python3 -m mmdnn.conversion._script.convertToIR -f keras -d keras_inception_v3 -n imagenet_inception_v3.json

3. Open the MMdnn model visualizer and choose file keras_inception_v3.json

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Examples

Offical Tutorial

• Keras "inception_v3" to CNTK and related issue

Users' Examples

• MXNet "resnet 152 11k" to PyTorch

• MXNet "resnext" to Keras

• Tensorflow "resnet 101" to PyTorch

• Tensorflow "mnist mlp model" to CNTK

• Tensorflow "Inception_v3" to MXNet

• Caffe "AlexNet" to Tensorflow

• Caffe "inception_v4" to Tensorflow

• Caffe "VGG16_SOD" to Tensorflow

• Caffe "Squeezenet v1.1" to CNTK

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Contributing

Intermediate Representation

The intermediate representation stores the network architecture in protobuf binary and pre-trained weights in NumPy native format.

[Note!] Currently the IR weights data is in NHWC (channel last) format.

Details are in ops.txt and graph.proto. New operators and any comments are welcome.

Frameworks

We are working on other frameworks conversion and visualization, such as Caffe2, PyTorch, CoreML and so on. And more RNN related operators are investigating. Any contributions and suggestions are welcome!

License

Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit https://cla.microsoft.com.

When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.

Acknowledgements

Thanks to Saumitro Dasgupta, the initial code of caffe -> IR converting is references to his project caffe-tensorflow.