inputs.py 文件源码

def expand_bboxes(xmin, xmax, ymin, ymax, cfg):
    """
    Expand the bboxes.
    """

    w = xmax - xmin
    h = ymax - ymin

    w = w * cfg.WIDTH_EXPANSION_FACTOR
    h = h * cfg.HEIGHT_EXPANSION_FACTOR

    half_w = w / 2.
    half_h = h / 2.

    xmin = tf.clip_by_value(xmin - half_w, 0, 1)
    xmax = tf.clip_by_value(xmax + half_w, 0, 1)
    ymin = tf.clip_by_value(ymin - half_h, 0, 1)
    ymax = tf.clip_by_value(ymax + half_h, 0, 1)

    return tf.tuple([xmin, xmax, ymin, ymax])