Drawable canvas

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I have a small issue I m trying to draw a polygon and use it as the ROI for detections in a video but I am not sure how exactly can I extract the points from the table as I am getting the following error for this code st.dataframe(pd.json_normalize(canvas_result.json_data["objects"])) in drawing a polygon ArrowTypeError: ("Expected bytes, got a 'int' object", 'Conversion failed for column path with type object')
I think the explanation is https://discuss.streamlit.io/t/all-in-on-apache-arrow/15342/3:

        if canvas_result.json_data is not None:
            objects = pd.json_normalize(canvas_result.json_data["objects"])
            for col in objects.select_dtypes(include=['object']).columns:
                objects[col] = objects[col].astype("str")
            st.dataframe(objects)
  • or change the serialization from arrow to legacy, by putting in .streamlit/config.toml the following:
[global]
dataFrameSerialization = "legacy"

@BeyondMyself the image is stored in image_data.image_data, the image_data variable contains 2 properties: image_data for the image and json_data for the canvas JSON representation.