import tensorflow as tf

    def create_architecture(self, sess, mode, num_classes, tag=None, anchor_scales=(8, 16, 32), anchor_ratios=(0.5, 1, 2)):
        self._image = tf.placeholder(tf.float32, shape=[self._batch_size, None, None, 3])
        self._im_info = tf.placeholder(tf.float32, shape=[self._batch_size, 3])   #缩放之后的图片尺寸和缩放的比例
        self._gt_boxes = tf.placeholder(tf.float32, shape=[None, 5])              #gt_boxes缩放之后的坐标以及所属类别的标号
