Non-linear dimensionality reduction using neural networks

Overview Document Retrieval – Present layer-by-layer pretraining and the fine-tuning of the multi-layer network that discovers binary codes in the top layer. This allows us to significantly speed-up retrieval time. – We also show how we can use our model to allow retrieval in constant time (a time independent of the number of documents). Show how to perform nonlinear embedding by preserving class neighbouthood structure (supervised, semi-supervised).