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Adaptive Fuzzy Positive Learning for Annotation-Scarce Semantic Segmentation

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Abstract

Annotation-scarce semantic segmentation aims to obtain meaningful pixel-level discrimination with scarce or even no manual annotations, of which the crux is how to utilize unlabeled data by pseudo-label learning. Typical works focus on ameliorating the error-prone pseudo-labeling, e.g., only utilizing high-confidence pseudo labels and filtering low-confidence ones out. But we think differently and resort to exhausting informative semantics from multiple probably correct candidate labels. This brings our method the ability to learn more accurately even though pseudo labels are unreliable. In this paper, we propose Adaptive Fuzzy Positive Learning (A-FPL) for correctly learning unlabeled data in a plug-and-play fashion, targeting adaptively encouraging fuzzy positive predictions and suppressing highly probable negatives. Specifically, A-FPL comprises two main components: (1) Fuzzy positive assignment (FPA) that adaptively assigns fuzzy positive labels to each pixel, while ensuring their quality through a T-value adaption algorithm (2) Fuzzy positive regularization (FPR) that restricts the predictions of fuzzy positive categories to be larger than those of negative categories. Being conceptually simple yet practically effective, A-FPL remarkably alleviates interference from wrong pseudo labels, progressively refining semantic discrimination. Theoretical analysis and extensive experiments on various training settings with consistent performance gain justify the superiority of our approach. Codes are at A-FPL.

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Funding

This work was supported in part by the National Key R &D Program of China (No. 2022ZD0118201), Natural Science Foundation of China (Nos. 61972217, 32071459, 62176249, 62006133, 62271465), the Shenzhen Medical Research Funds in China (No. B2302037), and AI for Science (AI4S)-Preferred Program, Peking University Shenzhen Graduate School, China.

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Authors and Affiliations

  1. School of Electronic and Computer Engineering, Peking University, Shenzhen, China

    Pengchong Qiao, Yu Wang & Jie Chen

  2. DAMO Academy, Alibaba Group, Hangzhou, China

    Pengchong Qiao, Lei Shang & Baigui Sun

  3. Peng Cheng Laboratory, Shenzhen, China

    Zhennan Wang, Xiawu Zheng, Rongrong Ji & Jie Chen

  4. Department of Artificial Intelligence, Xiamen University, Xiamen, China

    Xiawu Zheng & Rongrong Ji

  5. Department of Automation and BNRist, Tsinghua University, Beijing, China

    Chang Liu

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  1. Pengchong Qiao
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Qiao, P., Wang, Y., Liu, C. et al. Adaptive Fuzzy Positive Learning for Annotation-Scarce Semantic Segmentation. Int J Comput Vis 133, 1048–1066 (2025). https://doi.org/10.1007/s11263-024-02217-1

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