Context-Sensitive Decision Forests for Object Detection

In this paper we introduce Context-Sensitive Decision Forests - A new perspective to exploit contextual information in the popular decision forest framework for the object detection problem. They are tree-structured classifiers with the ability to access intermediate prediction (here: classification and regression) information during training and inference time. This intermediate prediction is available to each sample, which allows us to develop context-based decision criteria, used for refining the prediction process. In addition, we introduce a novel split criterion which in combination with a priority based way of constructing the trees, allows more accurate regression mode selection and hence improves the current context information. In our experiments, we demonstrate improved results for the task of pedestrian detection on the challenging TUD data set when compared to state-of-the-art methods.

Authors

• Peter Kontschieder
• Samuel Bulò
• Antonio Criminisi
• Pushmeet Kohli Microsoft Research
• Marcello Pelillo
• Horst Bischof Institute of Computer Graphics and Vision, Graz University of Technology, Graz, Austria

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