Are there any code to calc the BLEU-4

[yt605155624]

Hello,I have download your pre-trained model for google's tensorflow/im2txt,Thank you very,I have realized that there is a evaluate.py which allows training progress to be monitored in real-time.But there are many people have loaded there pre-trained models,but I don't know which are better,I can only chage a Image into a txt and see it myself,but you know there are many metrics to evaluate the model such as BLUE-4,I want to know ,are there any code for me to evaluate the models that have been downloaded from you or others WITHOUT RUN THE TRAIN CODE,I just want to run a code to gain a BLUE-4 score for some models,thank you very much !