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Existing studies in weakly supervised semantic segmentation (WSSS) have utilized class activation maps (CAMs) to localize the class objects. However, since a classification loss is insufficient for providing precise object regions, CAMs…

Computer Vision and Pattern Recognition · Computer Science 2021-12-13 Sung-Hoon Yoon , Hyeokjun Kweon , Jaeseok Jeong , Hyeonseong Kim , Shinjeong Kim , Kuk-Jin Yoon

Weakly supervised semantic segmentation (WSSS) aims to bypass the need for laborious pixel-level annotation by using only image-level annotation. Most existing methods rely on Class Activation Maps (CAM) to derive pixel-level pseudo-labels…

Computer Vision and Pattern Recognition · Computer Science 2023-11-07 Tianle Chen , Zheda Mai , Ruiwen Li , Wei-lun Chao

Image-level weakly supervised semantic segmentation (WSSS) relies on class activation maps (CAMs) for pseudo labels generation. As CAMs only highlight the most discriminative regions of objects, the generated pseudo labels are usually…

Computer Vision and Pattern Recognition · Computer Science 2021-10-28 Weixuan Sun , Jing Zhang , Nick Barnes

Weakly supervised semantic segmentation (WSSS) trains dense pixel-level segmentation models from partial or coarse annotations such as bounding boxes, scribbles, or image-level tags. While recent work leverages foundation models such as the…

Computer Vision and Pattern Recognition · Computer Science 2026-05-14 Stefano Colamonaco , Andrei-Bogdan Florea , Jaron Maene

Weakly supervised semantic segmentation (WSSS) has recently attracted considerable attention because it requires fewer annotations than fully supervised approaches, making it especially promising for large-scale image segmentation tasks.…

Computer Vision and Pattern Recognition · Computer Science 2025-05-30 Lechao Cheng , Zerun Liu , Jingxuan He , Chaowei Fang , Dingwen Zhang , Meng Wang

In this work, we propose a new transformer-based regularization to better localize objects for Weakly supervised semantic segmentation (WSSS). In image-level WSSS, Class Activation Map (CAM) is adopted to generate object localization as…

Computer Vision and Pattern Recognition · Computer Science 2023-09-26 Weixuan Sun , Yanhao Zhang , Zhen Qin , Zheyuan Liu , Lin Cheng , Fanyi Wang , Yiran Zhong , Nick Barnes

Weakly-supervised semantic segmentation (WSSS) has recently gained much attention for its promise to train segmentation models only with image-level labels. Existing WSSS methods commonly argue that the sparse coverage of CAM incurs the…

Computer Vision and Pattern Recognition · Computer Science 2022-03-31 Minhyun Lee , Dongseob Kim , Hyunjung Shim

Extracting class activation maps (CAM) is a key step for weakly-supervised semantic segmentation (WSSS). The CAM of convolution neural networks fails to capture long-range feature dependency on the image and result in the coverage on only…

Computer Vision and Pattern Recognition · Computer Science 2022-11-22 Jianqiang Huang , Jian Wang , Qianru Sun , Hanwang Zhang

Image-level weakly-supervised semantic segmentation (WSSS) reduces the usually vast data annotation cost by surrogate segmentation masks during training. The typical approach involves training an image classification network using global…

Computer Vision and Pattern Recognition · Computer Science 2024-06-10 Arvi Jonnarth , Yushan Zhang , Michael Felsberg

Semantic segmentation is a core computer vision problem, but the high costs of data annotation have hindered its wide application. Weakly-Supervised Semantic Segmentation (WSSS) offers a cost-efficient workaround to extensive labeling in…

Computer Vision and Pattern Recognition · Computer Science 2024-05-13 Elham Ravanbakhsh , Cheng Niu , Yongqing Liang , J. Ramanujam , Xin Li

Recent mainstream weakly-supervised semantic segmentation (WSSS) approaches mainly relies on image-level classification learning, which has limited representation capacity. In this paper, we propose a novel semantic learning based…

Computer Vision and Pattern Recognition · Computer Science 2022-11-11 Junliang Chen , Xiaodong Zhao , Minmin Liu , Linlin Shen

Weakly-Supervised Semantic Segmentation (WSSS) methods with image-level labels generally train a classification network to generate the Class Activation Maps (CAMs) as the initial coarse segmentation labels. However, current WSSS methods…

Computer Vision and Pattern Recognition · Computer Science 2022-02-11 Lixiang Ru , Bo Du , Yibing Zhan , Chen Wu

The image-level label has prevailed in weakly supervised semantic segmentation tasks due to its easy availability. Since image-level labels can only indicate the existence or absence of specific categories of objects, visualization-based…

Computer Vision and Pattern Recognition · Computer Science 2024-01-23 Tao Chen , Yazhou Yao , Xingguo Huang , Zechao Li , Liqiang Nie , Jinhui Tang

Weakly Supervised Semantic Segmentation (WSSS) with image-level labels typically uses Class Activation Maps (CAM) to achieve dense predictions. Recently, Vision Transformer (ViT) has provided an alternative to generate localization maps…

Computer Vision and Pattern Recognition · Computer Science 2025-01-20 Zhiwei Yang , Yucong Meng , Kexue Fu , Shuo Wang , Zhijian Song

Weakly Supervised Semantic Segmentation (WSSS) employs weak supervision, such as image-level labels, to train the segmentation model. Despite the impressive achievement in recent WSSS methods, we identify that introducing weak labels with…

Computer Vision and Pattern Recognition · Computer Science 2024-07-01 Junsung Park , Hyunjung Shim

Weakly Supervised Semantic Segmentation (WSSS) addresses the challenge of training segmentation models using only image-level annotations. Existing WSSS methods struggle with precise object boundary localization and focus only on the most…

Computer Vision and Pattern Recognition · Computer Science 2025-11-21 Ali Torabi , Sanjog Gaihre , MD Mahbubur Rahman , Yaqoob Majeed

Weakly-supervised semantic segmentation (WSSS) is introduced to narrow the gap for semantic segmentation performance from pixel-level supervision to image-level supervision. Most advanced approaches are based on class activation maps (CAMs)…

Computer Vision and Pattern Recognition · Computer Science 2021-09-24 Sanghyun Jo , In-Jae Yu

Weakly supervised semantic segmentation (WSSS) based on image-level labels is challenging since it is hard to obtain complete semantic regions. To address this issue, we propose a self-training method that utilizes fused multi-scale…

Computer Vision and Pattern Recognition · Computer Science 2023-05-11 Guoqing Yang , Chuang Zhu , Yu Zhang

Weakly Supervised Semantic Segmentation (WSSS) is challenging, particularly when image-level labels are used to supervise pixel level prediction. To bridge their gap, a Class Activation Map (CAM) is usually generated to provide pixel level…

Computer Vision and Pattern Recognition · Computer Science 2022-05-11 Weixuan Sun , Jing Zhang , Zheyuan Liu , Yiran Zhong , Nick Barnes

Most existing weakly supervised semantic segmentation (WSSS) methods rely on Class Activation Mapping (CAM) to extract coarse class-specific localization maps using image-level labels. Prior works have commonly used an off-line heuristic…

Computer Vision and Pattern Recognition · Computer Science 2024-03-05 Lian Xu , Mohammed Bennamoun , Farid Boussaid , Wanli Ouyang , Ferdous Sohel , Dan Xu
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