AIlib2/ocrUtils/pth2onnx.py

import  crnn_model.vgg_model as  vgg
import sys
from ocrTrt import toONNX,ONNXtoTrt
from collections import OrderedDict
import torch
import argparse
def crnnModel(opt):
    input_height=opt.mHeight
    input_width=opt.mWidth
    ##生成识别模型
    device='cuda:0'
    model_path = opt.weights
    recog_network, network_params = 'generation2',  {'input_channel': 1, 'output_channel': 256, 'hidden_size': 256,'input_height':input_height}
    num_class= 97
    model = vgg.Model(num_class=num_class, **network_params)
    ##修正模型参数的名字
    state_dict = torch.load(model_path,map_location=device)
  
    new_state_dict = OrderedDict()
    for k, v in state_dict.items():
        name = k[7:] # remove `module.`
        new_state_dict[name] = v
    # load params
    model.load_state_dict(new_state_dict)
    model = model.to(device)
    model.load_state_dict(new_state_dict)
    return model
    
   
if __name__=='__main__':

    parser = argparse.ArgumentParser()
    parser.add_argument('--weights', type=str, default='english_g2.onnx', help='model path(s)')
    parser.add_argument('--mWidth', type=int, default=640, help='segmodel mWdith')
    parser.add_argument('--mHeight', type=int, default=360, help='segmodel mHeight')
    opt = parser.parse_args()
    
    pthmodel = crnnModel(opt)
    
    ###转换TRT模型
    onnxFile=opt.weights.replace('.pth','_%dX%d.onnx'%(opt.mWidth,opt.mHeight))
    trtFile=opt.weights.replace('.pth','_%dX%d.engine'%(opt.mWidth,opt.mHeight))

    print('#'*20, ' begin to toONNX')
    toONNX(pthmodel,onnxFile,inputShape=(1,1,opt.mHeight, opt.mWidth),device='cuda:0')  
    print('#'*20, ' begin to TRT')
    ONNXtoTrt(onnxFile,trtFile,half=False)