Thank you for your code. However, when I use this method, I have so

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Why does my ensemble still have so many repetitive (IoU > thresh I set) bboxes? about weighted-boxes-fusion HOT 5 CLOSED

zfturbo commented on July 4, 2024 1

Why does my ensemble still have so many repetitive (IoU > thresh I set) bboxes?

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Comments (5)

ZFTurbo commented on July 4, 2024 1

You have y2 less than y1 and x2 less than x1. I probably need to fix it in code.

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ZFTurbo commented on July 4, 2024

Can you provide more deatils?
For example, 2 boxes with large IoU can be present together in case they have different labels (classes).

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ZFTurbo commented on July 4, 2024

def bb_intersection_over_union(A, B):
    xA = max(A[0], B[0])
    yA = max(A[1], B[1])
    xB = min(A[2], B[2])
    yB = min(A[3], B[3])

    # compute the area of intersection rectangle
    interArea = max(0, xB - xA) * max(0, yB - yA)

    if interArea == 0:
        return 0.0

    # compute the area of both the prediction and ground-truth rectangles
    boxAArea = (A[2] - A[0]) * (A[3] - A[1])
    boxBArea = (B[2] - B[0]) * (B[3] - B[1])

    iou = interArea / float(boxAArea + boxBArea - interArea)
    return iou

iou = bb_intersection_over_union(
        (0.73385417, 0.34259259, 0.81041667, 0.45648148),
        (0.74930206, 0.36653722, 0.79911662, 0.45000624),
)
print(iou)

It gives me 0.476852 < 0.5

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shonenkov commented on July 4, 2024

@ZFTurbo I have found the same problem, maybe this example can help

def bb_intersection_over_union(A, B):
    xA = max(A[0], B[0])
    yA = max(A[1], B[1])
    xB = min(A[2], B[2])
    yB = min(A[3], B[3])

    # compute the area of intersection rectangle
    interArea = max(0, xB - xA) * max(0, yB - yA)

    if interArea == 0:
        return 0.0

    # compute the area of both the prediction and ground-truth rectangles
    boxAArea = (A[2] - A[0]) * (A[3] - A[1])
    boxBArea = (B[2] - B[0]) * (B[3] - B[1])

    iou = interArea / float(boxAArea + boxBArea - interArea)
    return iou

iou = bb_intersection_over_union(
        (0.99804688, 0.58007812, 0.81835938, 0.43554688),
        (0.94726562, 0.55078125, 0.77734375, 0.4140625),
)
print(iou)
>>> 0.0

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ZFTurbo commented on July 4, 2024

I fixed problem. Earlier method works incorrect if x2 (or y2) was less than x1 (or y1), now it's automatically fixed with warning message. So latest version must be totally ok.

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