ciou_enclose_area

[lihualilee]

left and up why not tf.minimum()？why mot computer minimum is compute enclose_area?
left = tf.maximum(boxes1_coor[..., 0], boxes2_coor[..., 0])
up = tf.maximum(boxes1_coor[..., 1], boxes2_coor[..., 1])

[pythonlessons]

Unfortunately, this was not used in a code yet.

But you can see that we use:
left - [..., 0], up - [..., 1] ...

    left = tf.maximum(boxes1_coor[..., 0], boxes2_coor[..., 0])
    up = tf.maximum(boxes1_coor[..., 1], boxes2_coor[..., 1])
    right = tf.maximum(boxes1_coor[..., 2], boxes2_coor[..., 2])
    down = tf.maximum(boxes1_coor[..., 3], boxes2_coor[..., 3])

this is why we use maximum