Yolo_v3_bbox_giou

Yolo_v3_bbox_giou.py

def  bbox_giou (boxes1, boxes2):
    ...
    # Calculate the iou value between the two bounding boxes     
    iou = inter_area / union_area 
    
    # Calculate the coordinates of the upper left corner and the lower right corner of the smallest closed convex surface     
    enclose_left_up = tf.minimum (boxes1 [..., :2], boxes2 [..., :2])    
    enclose_right_down = tf.maximum (boxes1 [..., 2:], boxes2 [..., 2:])    
    enclose = tf.maximum(enclose_right_down-enclose_left_up, 0.0 ) 
    
    # Calculate the area of the smallest closed convex surface C     
    enclose_area = enclose [..., 0 ] * enclose [..., 1 ] 

    # Calculate the GIoU value according to the GioU formula     
    giou = iou- 1.0 * (enclose_area-union_area) / enclose_area 

    return giou