===========================paddle2onnx_params===========================
model_name:pp_liteseg_stdc2
python:python3.7
2onnx: paddle2onnx
--model_dir:./test_tipc/infer_models/pp_liteseg_stdc2_fix_shape/
--model_filename:model.pdmodel
--params_filename:model.pdiparams
--save_file:./test_tipc/infer_models/pp_liteseg_stdc2_fix_shape/model.onnx
--opset_version:11
--enable_onnx_checker:True
inference:deploy/python/infer_onnx.py
--onnx_file:./test_tipc/infer_models/pp_liteseg_stdc2_fix_shape/model.onnx
--img_path:test_tipc/cpp/cityscapes_demo.png