===========================paddle2onnx_params===========================
model_name:ch_PP-OCRv2
python:python3.7
2onnx: paddle2onnx
--det_model_dir:./inference/ch_PP-OCRv2_det_infer/
--model_filename:inference.pdmodel
--params_filename:inference.pdiparams
--det_save_file:./inference/det_v2_onnx/model.onnx
--rec_model_dir:./inference/ch_PP-OCRv2_rec_infer/
--rec_save_file:./inference/rec_v2_onnx/model.onnx
--opset_version:10
--enable_onnx_checker:True
inference:tools/infer/predict_system.py --rec_image_shape="3,32,320"
--use_gpu:True|False
--det_model_dir:
--rec_model_dir:
--image_dir:./inference/ch_det_data_50/all-sum-510/00008790.jpg