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Barbados Lands and Surveys Plot Automation Challenge

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Computer Vision
Geospatial Data
Optical Character Recognition
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Zambia_Kuchalo
Typaflow Software Systems Limited
Bounding Box
Help · 18 Oct 2025, 16:25 · 23

Greetings Zindians;

I hope all is well with you all. I just needed help to see a sample bounding box.

Discussion 23 answers
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CodeJoe

Sample bounding box?

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Zambia_Kuchalo

yes, by the way am trying to add image. how can i do that. am failing

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CodeJoe

I don't really get what you need? We are dealing with segmentation not object detection

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Zambia_Kuchalo

Theres an idea am trying to implement

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Zambia_Kuchalo

Is it not that we are supposed to get the segmentation of the green area???

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CodeJoe

If I get you right, you want the bounding boxes first before implementing segmentation?

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Zambia_Kuchalo

Yes

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CodeJoe

No some have the brown, green, yellow and at times blue.

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Zambia_Kuchalo

I already Know wrote an algorithm that draw that bounding box above

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Zambia_Kuchalo

My confusion is whether the bounding the border edges is affecting IoU

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CodeJoe

I think most of us did not train an object detection model for that but instead used a segmentation model.

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Zambia_Kuchalo

Did not train an object detection model, its an algorithm

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CodeJoe

Yes it is definitely. Mask it and see the difference in IOU per ground truth.

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Zambia_Kuchalo

Let me try working something out

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Zambia_Kuchalo

Thanks for responding

GoodDay

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CodeJoe

You are welcome brother!

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offei_ladAmbassador
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No it is not going to affect the IoU but if you want to be safe add some padding to the box?

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CodeJoe

Bro it does, From what he wants to do. He uses the bounding boxes to get the exact polygon boundaries before segmenting so that it looks like the masked image of the ground truth - If he pads or he doesn't pad, it will still distort the shape of the polygons do you get it? It will not distort it, if the algorithm gets the exact bounding box. If not, it will distort it by a 4% - God knows how much😂.

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offei_ladAmbassador
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So that he will use the ground truth given to train? 😂, did not think that is what he was trying to do, no way it's working then, Distortion in some of the shapes will be fatal to IoU

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offei_ladAmbassador
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Wait, it seems his algorithm captures the most extreme ends of the polygon, he can convert the ground truth to make the mask border on the extreme edges and he will get a perfect overlap, if his algorithm is accurate then it will

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Zambia_Kuchalo

Noted with thanks,

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CodeJoe

Now compare it to the ground truth, if it is above 97 IOU, you are likely doing it right

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CodeJoe

@offei_lad that is very true!

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