Unsupervised Hierarchical Semantic Segmentation with Multiview Cosegmentation and Clustering Transformers

• URL: http://arxiv.org/abs/2204.11432v1
• Date: Mon, 25 Apr 2022 04:40:46 GMT
• Title: Unsupervised Hierarchical Semantic Segmentation with Multiview Cosegmentation and Clustering Transformers
• Authors: Tsung-Wei Ke, Jyh-Jing Hwang, Yunhui Guo, Xudong Wang and Stella X. Yu
• Abstract summary: Grouping naturally has levels of granularity, creating ambiguity in unsupervised segmentation. We deliver the first data-driven unsupervised hierarchical semantic segmentation method called Hierarchical Segment Grouping (HSG)
• Score: 47.45830503277631
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Unsupervised semantic segmentation aims to discover groupings within and across images that capture object and view-invariance of a category without external supervision. Grouping naturally has levels of granularity, creating ambiguity in unsupervised segmentation. Existing methods avoid this ambiguity and treat it as a factor outside modeling, whereas we embrace it and desire hierarchical grouping consistency for unsupervised segmentation. We approach unsupervised segmentation as a pixel-wise feature learning problem. Our idea is that a good representation shall reveal not just a particular level of grouping, but any level of grouping in a consistent and predictable manner. We enforce spatial consistency of grouping and bootstrap feature learning with co-segmentation among multiple views of the same image, and enforce semantic consistency across the grouping hierarchy with clustering transformers between coarse- and fine-grained features. We deliver the first data-driven unsupervised hierarchical semantic segmentation method called Hierarchical Segment Grouping (HSG). Capturing visual similarity and statistical co-occurrences, HSG also outperforms existing unsupervised segmentation methods by a large margin on five major object- and scene-centric benchmarks. Our code is publicly available at https://github.com/twke18/HSG .

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