Maybe you were wondering how you can place funny objects on faces in real-time video chats or detect emotions? I’ll show you one possible approach here utilizing deep learning as well as skim over one older approach. A challenging task in the past was detection of faces and their features like eyes, nose, mouth and even deriving emotions from their shapes. This task can be now “magically” solved b

In this post I will do my best to demystify three dimensionality reduction techniques; PCA, t-SNE and Auto Encoders. My main motivation for doing so is that mostly these methods are treated as black boxes and therefore sometime are misused. Understanding them will give the reader the tools to decide which one to use, when and how. I’ll do so by going over the internals of each methods and code fro