Revert "Revert "Merge branch 'master' into thick_conv_lstm""

This reverts commit 7339103.

Author: pascalxia

train.py

@@ -202,6 +202,8 @@ def _parse_function(example):
 
     if not weight_data:
       weights = tf.ones(tf.shape(weights))
+    else:
+      weights = tf.tile(tf.reduce_mean(weights, axis=0, keep_dims=True), [tf.shape(cameras)[0],])
 
 
     # return features and labels