German Conference on Pattern Recognition

Pattern Recognition pp 517-528 | Cite as

What Is Holding Back Convnets for Detection?

  • Bojan Pepik
  • Rodrigo Benenson
  • Tobias Ritschel
  • Bernt Schiele
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9358)

Abstract

Convolutional neural networks have recently shown excellent results in general object detection and many other tasks. Albeit very effective, they involve many user-defined design choices. In this paper we want to better understand these choices by inspecting two key aspects “what did the network learn?”, and “what can the network learn?”. We exploit new annotations (Pascal3D+), to enable a new empirical analysis of the R-CNN detector. Despite common belief, our results indicate that existing state-of-the-art convnets are not invariant to various appearance factors. In fact, all considered networks have similar weak points which cannot be mitigated by simply increasing the training data (architectural changes are needed). We show that overall performance can improve when using image renderings as data augmentation. We report the best known results on Pascal3D+ detection and view-point estimation tasks.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Bojan Pepik
    • 1
  • Rodrigo Benenson
    • 1
  • Tobias Ritschel
    • 1
  • Bernt Schiele
    • 1
  1. 1.Max-Planck Institute for InformaticsSaarbrückenGermany

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