Multi-View Deep Learning for Consistent Semantic Mapping with RGB-D Cameras

Lingni Ma, Jörg Stückler, Christian Kerl, Daniel Cremers
IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS'17), to appear

Visual scene understanding is an important capability that enables robots to purposefully act in their environment. In this paper, we propose a novel deep neural network approach to predict semantic segmentation from RGB-D sequences. The key innovation is to train our network to predict multi-view consistent semantics in a self-supervised way. At test time, its semantics predictions can be fused more consistently in semantic keyframe maps than predictions of a network trained on individual views. We base our network architecture on a recent single-view deep learning approach to RGB and depth fusion for semantic object-class segmentation and enhance it with multi-scale loss minimization. We obtain the camera trajectory using RGB-D SLAM and warp the predictions of RGB-D images into ground-truth annotated frames in order to enforce multi-view consistency during training. At test time, predictions from multiple views are fused into keyframes. We propose and analyze several methods for enforcing multi-view consistency during training and testing. We evaluate the benefit of multi-view consistency training and demonstrate that pooling of deep features and fusion over multiple views outperforms single-view baselines on the NYUDv2 benchmark for semantic segmentation. Our end-to-end trained network achieves state-of-the-art performance on the NYUDv2 dataset in single-view segmentation as well as multi-view semantic fusion.

» Show BibTeX

@string{iros="International Conference on Intelligent Robots and Systems (IROS)"}
@InProceedings{lingni17iros,
author = "Lingni Ma and J\"org St\"uckler and Christian Kerl and Daniel Cremers",
title = "Multi-View Deep Learning for Consistent Semantic Mapping with RGB-D Cameras",
booktitle = "IEEE/RSJ Int. Conf. on Intelligent Robots and Systems (IROS)",
year = "2017",
}




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