onnx动态模型转静态模型

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于 2022-09-29 10:36:40 发布 · 1.1k 阅读

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CC 4.0 BY-SA版权

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#python #深度学习 #机器学习

本文介绍如何将基于ONNX的动态深度学习模型转换为静态模型，以优化推理性能。通过Python接口，我们可以方便地进行模型转换，提升模型在实际应用中的效率。

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import onnx
import onnxruntime as rt
import os
import numpy as np
import argparse

class fix_dim_tools:
    def __init__(self, model_path, inputs_shape, inputs_dtype):
        assert os.path.exists(model_path), "{} not exists".format(model_path)
        if inputs_dtype is None:
            print('inputs_dtype is not define, use float for all inputs node')
            inputs_dtype = ['float']*len(inputs_shape)
        else:
            assert len(inputs_shape)==len(inputs_dtype), "inputs shape list should have same length as inputs_dtype"
    
        model = onnx.load(model_path)
        self.model = model
        self.model_path = model_path
        self.inputs_shape = inputs_shape
        self.inputs_dtype = inputs_dtype

        self.inputs_shape_dict = {
   
   }
        self.inputs_type_dict = {
   
   }
        self.outputs_shape_dict = {
   
   }
    
    def check_dynamic_input(self):
        # check dynamic input and get real input shape
        inputs_number = len(self.model.graph.input)
        assert inputs_number==len(self.inputs_shape),"model has {} inputs, but {} inputs_shape was given, not match".format(inputs_number,len(self.inputs_shape)