def yolo2xxyy(yolo):
    """convert yolo to coordinates bbox format
    
    Args:
        yolo (tuple): (ratio-bbox-centre-x, ratio-bbox-centre-y, ratio-bbox-w, ratio-bbox-h)

    Rets:
        box (tuple): (xmin, xmax, ymin, ymax)
    """
    x,y,w,h = yolo
    x1, y1 = x-w/2, y-h/2
    x2, y2 = x+w/2, y+h/2
    return (x1, x2, y1, y2)