[Bug] Coordinates for XYWH and XYX2Y2 swaped when type_coordinates == CoordinatesType.RELATIVE about review_object_detection_metrics HOT 3 CLOSED

@dmesquita ,

Note that Azure follows COCO's annotation format, which is x_relative, y_relative, width_relative, height_relative.

In our repository, the BoundingBox object in the format XYWH RELATIVE refers to YOLO's relative format:

The difference is that YOLO's format has the first two coordinates (x,y) as the center of the bounding box.

I hope that helped. :)

from review_object_detection_metrics.

Hi @dmesquita ,

Thank you for your message.

The values are correct. Please, see the explanation below:

When you create the following bounding box:

bbox = BoundingBox(
    "img_filename",
    "category_class",
    (
        0.04287003610108303,
        0.04801829268292683,
        0.22021660649819497,
        0.11178861788617887,
    ),
    CoordinatesType.RELATIVE,
    (540, 960),
    None,
    BBType.GROUND_TRUTH,
    BBFormat.XYWH,
)

1. you are setting the following bounding box coordinates in the relative format:

x_center = 0.04287003610108303
y_center = 0.04801829268292683
width = 0.22021660649819497
height = 0.11178861788617887

2. you are considering the resolution of your image as width=540 and height=960

Note that the relative coordinates you are providing are in the following format (x_center, y_center, width, height):

So, when you convert the relative coordinates into absolute coordinates, you will have the following values:
X = -36.3086
Y = -7.9024
width = 118.9169
height = 107.3170

Best regards,
Rafael

from review_object_detection_metrics.

Thanks! It' seems strange, I'm using a dataset from the Azure Custom Vision export and it says the coordinates are "bbox": [x,y,width,height]". When I plot them using x and y with bbox (instead of Xc and Yc) the bb seem to be ploted correctly. I'll dig deep to see what's going on, thanks!

from review_object_detection_metrics.