How to register detection in PolygonZone for any overlap

[marcospgp]

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Question

How can I register a detection inside a PolygonZone when there is any overlap? Without requiring the entire bounding box to be contained inside the zone.

I tried using triggering_anchors but it didn't work:

    polygon_zone = sv.PolygonZone(
        polygon=zone_ndarray,
        frame_resolution_wh=(img_width, img_height),
        # Make a detection be considered inside the zone if there is any
        # overlap.
        triggering_anchors=[
            Position.TOP_LEFT,
            Position.TOP_RIGHT,
            Position.BOTTOM_RIGHT,
            Position.BOTTOM_LEFT,
        ],
    )

Thanks!

Additional

No response

[marcospgp]

I believe my code would work if this line had an np.any instead of np.all:

supervision/supervision/detection/tools/polygon_zone.py

Line 88 in 5f9560a

is_in_zone: npt.NDArray[np.bool_] = np.all(is_in_zone, axis=1)

Maybe there could be a way to specify whether one wants to register a detection if all anchors are contained, or if any is?

Maybe a require_all_anchors=True parameter to the sv.PolygonZone() constructor, which by defaulting to True would not cause any breaking changes.

This list of anchors way of specifying how to determine presence is not ideal maybe, I believe most use cases would be either "full overlap" or "any overlap". Currently, only full overlap is possible, and the default of (Position.BOTTOM_CENTER) does not seem like a common use case at all 🤔

[SkalskiP]

Hi once again, @marcospgp 👋🏻 Yup, it looks like changing this one line could unlock you. Would you like to implement such a feature for us?