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@@ -51,16 +51,17 @@ def pairwise_intersection(boxes1, boxes2):
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swap = True
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for i in range(boxes1.shape[0]):
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- x_begin = np.maximum(boxes1[i, 0], boxes2[:, 0])
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- y_begin = np.maximum(boxes1[i, 1], boxes2[:, 1])
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- x_end = np.minimum(boxes1[i, 2], boxes2[:, 2])
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- y_end = np.minimum(boxes1[i, 3], boxes2[:, 3])
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- x_end -= x_begin
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- y_end -= y_begin
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- np.maximum(x_end, 0, x_end)
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- np.maximum(y_end, 0, y_end)
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- x_end *= y_end
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- intersect_areas[i, :] = x_end
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+ max_x_mins = np.maximum(boxes1[i, 0], boxes2[:, 0])
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+ max_y_mins = np.maximum(boxes1[i, 1], boxes2[:, 1])
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+ min_x_maxs = np.minimum(boxes1[i, 2], boxes2[:, 2])
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+ min_y_maxs = np.minimum(boxes1[i, 3], boxes2[:, 3])
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+
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+ min_x_maxs -= max_x_mins
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+ min_y_maxs -= max_y_mins
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+ np.maximum(min_x_maxs, 0, min_x_maxs)
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+ np.maximum(min_y_maxs, 0, min_y_maxs)
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+ min_x_maxs *= min_y_maxs
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+ intersect_areas[i, :] = min_x_maxs
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if swap:
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intersect_areas = intersect_areas.T
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return intersect_areas
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quarrying