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arXiv · 1905.07506

Parts4Feature: Learning 3D Global Features from Generally Semantic Parts in Multiple Views

Zhizhong Han·Xinhai Liu·Yu-Shen Liu·Matthias Zwicker
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Abstract

Deep learning has achieved remarkable results in 3D shape analysis by learning global shape features from the pixel-level over multiple views. Previous methods, however, compute low-level features for entire views without considering part-level information. In contrast, we propose a deep neural network, called Parts4Feature, to learn 3D global features from part-level information in multiple views. We introduce a novel definition of generally semantic parts, which Parts4Feature learns to detect in multiple views from different 3D shape segmentation benchmarks. A key idea of our architecture is that it transfers the ability to detect semantically meaningful parts in multiple views to learn 3D global features. Parts4Feature achieves this by combining a local part detection branch and a global feature learning branch with a shared region proposal module. The global feature learning branch aggregates the detected parts in terms of learned part patterns with a novel multi-attention mechanism, while the region proposal module enables locally and globally discriminative information to be promoted by each other. We demonstrate that Parts4Feature outperforms the state-of-the-art under three large-scale 3D shape benchmarks.

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Zhizhong Han, Xinhai Liu, Yu-Shen Liu, Matthias Zwicker. 2019-05-18. Parts4Feature: Learning 3D Global Features from Generally Semantic Parts in Multiple Views. https://arxiv.org/abs/1905.07506

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