Created
July 24, 2018 11:56
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def bb_intersection_over_union(boxA, boxB): | |
# determine the (x, y)-coordinates of the intersection rectangle | |
xA = max(boxA[0], boxB[0]) | |
yA = max(boxA[1], boxB[1]) | |
xB = min(boxA[2], boxB[2]) | |
yB = min(boxA[3], boxB[3]) | |
# compute the area of intersection rectangle | |
interArea = max(0, xB - xA + 1) * max(0, yB - yA + 1) | |
# compute the area of both the prediction and ground-truth | |
# rectangles | |
boxAArea = (boxA[2] - boxA[0] + 1) * (boxA[3] - boxA[1] + 1) | |
boxBArea = (boxB[2] - boxB[0] + 1) * (boxB[3] - boxB[1] + 1) | |
# compute the intersection over union by taking the intersection | |
# area and dividing it by the sum of prediction + ground-truth | |
# areas - the interesection area | |
iou = interArea / float(boxAArea + boxBArea - interArea) | |
# return the intersection over union value | |
return iou |
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