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

TL;DR

This paper introduces a multi-view deep learning approach for consistent semantic segmentation using RGB-D cameras, improving accuracy by fusing information from multiple viewpoints during training and testing.

Contribution

It presents a novel multi-view training framework that enhances semantic segmentation consistency and accuracy over single-view methods using RGB-D data.

Findings

Multi-view training improves segmentation accuracy.

Fusion of multiple views outperforms single-view baselines.

Achieves state-of-the-art results on NYUDv2 dataset.

Abstract

Visual scene understanding is an important capability that enables robots to purposefully act in their environment. In this paper, we propose a novel approach to object-class segmentation from multiple RGB-D views using deep learning. We train a deep neural network to predict object-class semantics that is consistent from several view points in a semi-supervised way. At test time, the semantics predictions of our network 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.