对ONNX模型进行BN和卷积层的融合

对Resnet50.onnx模型进行BN和卷积层的融合

一、准备工作

安装ONNX

You can then install ONNX from PyPi (Note: Set environment variable ONNX_ML=1 for onnx-ml):

pip install onnx

You can also build and install ONNX locally from source code:

git clone https://github.com/onnx/onnx.git

cd onnx

git submodule update --init --recursive

python setup.py install

二、源码

import onnx
import os
from onnx import optimizer

# Preprocessing: load the model contains two transposes.
# model_path = os.path.join('resources', 'two_transposes.onnx')
# original_model = onnx.load(model_path)
original_model = onnx.load("resnet50.onnx")

print('The model before optimization:

{}'.format(onnx.helper.printable_graph(original_model.graph)))


# A full list of supported optimization passes can be found using get_available_passes()
all_passes = optimizer.get_available_passes()
print("Available optimization passes:")
for p in all_passes:
    print('	{}'.format(p))
print()

# Pick one pass as example
passes = ['fuse_add_bias_into_conv']

# Apply the optimization on the original serialized model
optimized_model = optimizer.optimize(original_model, passes)

print('The model after optimization:

{}'.format(onnx.helper.printable_graph(optimized_model.graph)))

# save new model
onnx.save(optimized_model, "newResnet50.onnx")