Does the algorithm generate a binary hash? or does it generates a real valued vector? I have been using Tensor Flow to build something similar, though its sign

Does the algorithm generate a binary hash? or does it generates a real valued vector? I have been using Tensor Flow to build something similar, though its significantly more computationally expensive but can allow you to find semantically related images. I still have to find an optimal encoding scheme for efficient nearest neighbors. E.g. https://raw.githubusercontent.com/AKSHAYUBHAT/VisualSearchServer/master/appcode/static/alpha4.png https://raw.githubusercontent.com/AKSHAYUBHAT/VisualSearchSe... https://raw.githubusercontent.com/AKSHAYUBHAT/VisualSearchServer/master/appcode/static/alpha3.png https://raw.githubusercontent.com/AKSHAYUBHAT/VisualSearchSe...