import tensorflow as tf

      depth = im.get_shape().as_list()[1]
      height = im.get_shape().as_list()[2]
      width = im.get_shape().as_list()[3]
      channels = im.get_shape().as_list()[4]

      x = tf.to_float(x)
      y = tf.to_float(y)
      z = tf.to_float(z)
      depth_f = tf.to_float(depth)
      height_f = tf.to_float(height)
      width_f = tf.to_float(width)
      # Number of disparity interpolated.
