[Support]: Snapshot coordinates mismatch

[esvaf]

Describe the problem you are having

I am trying to crop event snapshots by region, but the outlined actual object often goes beyond the designated area. It seems that the coordinates provided do not correspond to the time the snapshot was taken, and I suspect this might be a bug. Below, I have included an example of the full snapshot and the cropped version according to the given coordinates. I am also attaching the coordinates from the API.

{
"area": null,
"box": null,
"camera": "camname",
"data": {
"attributes": [],
"box": [
0.16463414634146342,
0.3840277777777778,
0.29796747967479675,
0.6104166666666667
],
"region": [
0.08495934959349594,
0.28055555555555556,
0.4211382113821138,
0.7194444444444444
],
"score": 0.96484375,
"top_score": 0.98828125,
"type": "object"
},
"detector_type": "edgetpu",
"end_time": 1719259084.195377,
"false_positive": null,
"has_clip": true,
"has_snapshot": true,
"id": "1719259067.956302-0asycd",
"label": "car",
"model_hash": "1fa745af0539ba5a2e001ea60d470584",
"model_type": "ssd",
"plus_id": null,
"ratio": 1,
"region": null,
"retain_indefinitely": false,
"score": null,
"start_time": 1719259062.956302,
"sub_label": null,
"thumbnail": "< omitted >",
"top_score": null,
"zones": [
"road_area"
]
}

Steps to reproduce

Wait for a fast-moving object and check the snapshot.

Version

0.13.2

Frigate config file

NA

Relevant log output

NA

Operating system

Other Linux

Install method

Docker Compose

Network connection

Wired

Camera make and model

Hikvision

Any other information that may be helpful

No response

[NickM-27]

So to be clear which coordinates are you using to crop?

[esvaf]

So to be clear which coordinates are you using to crop?

I use the coordinates of the region because they cover a slightly larger area of the frame than the coordinates of the box.

[NickM-27]

Okay, this is not a bug I think you are just using the coordinates wrong. The coordinates are [x, y, width, height] so it is impossible for the box to be outside of the region because in this case the right edge of the region is 0.5 while the right edge of the box is 0.45

[esvaf]

The coordinates are [x, y, width, height]
I couldn't find a description of these values anywhere in the documentation and was sure that these were the coordinates of the corners. Thanks a lot! Everything looks correct now.