Learning in compressed space

  • Authors:
  • Alexander Fabisch;Yohannes Kassahun;Hendrik WöHrle;Frank Kirchner

  • Affiliations:
  • University of Bremen, Fachbereich 3 - Mathematik und Informatik, Postfach 330 440, 28334 Bremen, Germany;University of Bremen, Fachbereich 3 - Mathematik und Informatik, Postfach 330 440, 28334 Bremen, Germany;Robotics Innovation Center, German Research Center for Artificial Intelligence (DFKI), Robert-Hooke-Str. 5, 28359 Bremen, Germany;University of Bremen, Fachbereich 3 - Mathematik und Informatik, Postfach 330 440, 28334 Bremen, Germany and Robotics Innovation Center, German Research Center for Artificial Intelligence (DFKI), ...

  • Venue:
  • Neural Networks
  • Year:
  • 2013

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Abstract

We examine two methods which are used to deal with complex machine learning problems: compressed sensing and model compression. We discuss both methods in the context of feed-forward artificial neural networks and develop the backpropagation method in compressed parameter space. We further show that compressing the weights of a layer of a multilayer perceptron is equivalent to compressing the input of the layer. Based on this theoretical framework, we will use orthogonal functions and especially random projections for compression and perform experiments in supervised and reinforcement learning to demonstrate that the presented methods reduce training time significantly.