Better handling of wrong data types of mask for sv.PolygonZone()

[GeorgePearse]

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• I have searched the Supervision issues and found no similar feature requests.

Description

OpenCV errors out with an uninformative error when the dtype of the mask is wrong.

Would be good to add catch if dtype != np.int32 and raise an Exception.

Use case

I was trying to create a mask in CVAT, the exported segmentation had decimal places, np.array(coords) did not convert to np.int32, and I was confused by the bad error message.

This is likely to happen to other users too .

Additional

Happy to submit PR

Are you willing to submit a PR?

• Yes I'd like to help by submitting a PR!

[github-actions]

Hello there, thank you for opening an Issue ! 🙏🏻 The team was notified and they will get back to you asap.

[SkalskiP]

Hi, @GeorgePearse 👋🏻! I think it would be even better if we tried to cast dtype to int. If the only thing that was wrong was the type we will fix it for you. What do you think about it?

[GeorgePearse]

Yep, better idea

[SkalskiP]

I'll try to make it happen with next release :)