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Behind Every Domain There is a Shift: Adapting Distortion-aware Vision Transformers for Panoramic Semantic Segmentation

25 Jul 2022arXiv:2207.11860archive 2025-07-28

Jiaming Zhang, Kailun Yang, Hao Shi, Simon Reiß, Kunyu Peng, Chaoxiang Ma, Haodong Fu, Philip H. S. Torr, Kaiwei Wang, Rainer Stiefelhagen

In this paper, we address panoramic semantic segmentation which is under-explored due to two critical challenges: (1) image distortions and object deformations on panoramas; (2) lack of semantic annotations in the 360{\deg} imagery. To tackle these problems, first, we propose the upgraded Transformer for Panoramic Semantic Segmentation, i.e., Trans4PASS+, equipped with Deformable Patch Embedding (DPE) and Deformable MLP (DMLPv2) modules for handling object deformations and image distortions whenever (before or after adaptation) and wherever (shallow or deep levels). Second, we enhance the Mutual Prototypical Adaptation (MPA) strategy via pseudo-label rectification for unsupervised domain adaptive panoramic segmentation. Third, aside from Pinhole-to-Panoramic (Pin2Pan) adaptation, we create a new dataset (SynPASS) with 9,080 panoramic images, facilitating Synthetic-to-Real (Syn2Real) adaptation scheme in 360{\deg} imagery. Extensive experiments are conducted, which cover indoor and outdoor scenarios, and each of them is investigated with Pin2Pan and Syn2Real regimens. Trans4PASS+ achieves state-of-the-art performances on four domain adaptive panoramic semantic segmentation benchmarks. Code is available at https://github.com/jamycheung/Trans4PASS.

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Code

jamycheung/trans4pass officialmentioned in papermentioned on GitHubpytorchApache-2.0 report

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Tasks

Domain AdaptationPseudo LabelSegmentationSemantic SegmentationUnsupervised Domain Adaptation

Results from the paper archive 2025-07-28

TaskDatasetModelMetricValueRank at snapshotLeaderboardReport
Semantic Segmentation DensePASS Trans4PASS+ (multi-scale) mIoU 57.23% #1 of 36 Archive leaderboard report
Semantic Segmentation DensePASS Trans4PASS+ (single-scale) mIoU 56.45% #2 of 36 Archive leaderboard report
Semantic Segmentation Stanford2D3D Panoramic Trans4PASS+ (Supervised + Small + MS) mIoU 54.0% #7 of 25 Archive leaderboard report
Semantic Segmentation Stanford2D3D Panoramic Trans4PASS+ (UDA + MPA + MS) mIoU 52.3% #10 of 25 Archive leaderboard report
Semantic Segmentation SynPASS Trans4PASS+ mIoU 39.16% #1 of 6 Archive leaderboard report

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Methods

Absolute Position EncodingsAdamAttentionBPEDense ConnectionsDropoutLabel SmoothingLayer NormalizationLinear LayerMulti-Head AttentionPosition-Wise Feed-Forward LayerResidual ConnectionSoftmaxTransformer

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