https://research.googleblog.com/2016/09/show-and-tell-image-captioning-open.html
https://github.com/tensorflow/models/tree/master/im2txt

A TensorFlow implementation of the image-to-text model described in the paper:

"Show and Tell: Lessons learned from the 2015 MSCOCO Image Captioning Challenge."

Oriol Vinyals, Alexander Toshev, Samy Bengio, Dumitru Erhan.

IEEE transactions on pattern analysis and machine intelligence (2016).

Full text available at: http://arxiv.org/abs/1609.06647