How to read onnx and obtain names, imgsz about onnx HOT 3 OPEN

I'm not sure that I understand your question properly.

"task" means the usage of your model (in this case it's a detection model - given an image, the model will tell you what it is).
"imgsz" means the image size of your model input.
"names" seems to be all image categories that your model may figure out.

if you want to get these meta data programmatically, you may check the .proto file format, which may tell you how to fetch all these fields.

from onnx.

I suspect they are stored in the metadata_props field. You may check model.metadata_props for them.

from onnx.

Check here for how to load an onnx model. (For more information, protobuf's generated python API documentation will tell you about the different fields.)

from onnx.