Practical Applications of Deep Learning in Facebook

In the master thesis I wrote which is based on this paper, it emphasizes the practical aspects of convolutional neural networks for image/video processing. The convolutional neural network which is developed by Yann LeCun demonstrates in the early days before deep/representation learning that Neural Network can be trained to extract features by learning application specific feature detectors directly from images. Note that this algorithm (or variant of it) has been used in banks to read cheques for very long time. So I would expect that there will be a lot of practical applications of it in Facebook as well after Yann LeCun starts working with Facebook.