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Weakly supervised object localization has recently attracted attention since it aims to identify both class labels and locations of objects by using image-level labels. Most previous methods utilize the activation map corresponding to the…

Computer Vision and Pattern Recognition · Computer Science 2019-12-20 Seunghan Yang , Yoonhyung Kim , Youngeun Kim , Changick Kim

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

Classification activation map (CAM), utilizing the classification structure to generate pixel-wise localization maps, is a crucial mechanism for weakly supervised object localization (WSOL). However, CAM directly uses the classifier trained…

Computer Vision and Pattern Recognition · Computer Science 2022-07-19 Lei Zhu , Qian Chen , Lujia Jin , Yunfei You , Yanye Lu

Classification networks can be used to localize and segment objects in images by means of class activation maps (CAMs). However, without pixel-level annotations, classification networks are known to (1) mainly focus on discriminative…

Computer Vision and Pattern Recognition · Computer Science 2023-04-05 Arvi Jonnarth , Michael Felsberg

Class activation map (CAM) has been widely used to highlight image regions that contribute to class predictions. Despite its simplicity and computational efficiency, CAM often struggles to identify discriminative regions that distinguish…

Computer Vision and Pattern Recognition · Computer Science 2025-04-01 Ziheng Zhang , Jianyang Gu , Arpita Chowdhury , Zheda Mai , David Carlyn , Tanya Berger-Wolf , Yu Su , Wei-Lun Chao

Weakly Supervised Semantic Segmentation (WSSS) with image-level labels has long been suffering from fragmentary object regions led by Class Activation Map (CAM), which is incapable of generating fine-grained masks for semantic segmentation.…

Computer Vision and Pattern Recognition · Computer Science 2023-03-07 Jiren Mai , Fei Zhang , Junjie Ye , Marcus Kalander , Xian Zhang , WanKou Yang , Tongliang Liu , Bo Han

Weakly Supervised Object Localization (WSOL) aims to localize objects with image-level supervision. Existing works mainly rely on Class Activation Mapping (CAM) derived from a classification model. However, CAM-based methods usually focus…

Computer Vision and Pattern Recognition · Computer Science 2022-05-30 Jilan Xu , Junlin Hou , Yuejie Zhang , Rui Feng , Rui-Wei Zhao , Tao Zhang , Xuequan Lu , Shang Gao

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 object localization aims to find a target object region in a given image with only weak supervision, such as image-level labels. Most existing methods use a class activation map (CAM) to generate a localization map;…

Computer Vision and Pattern Recognition · Computer Science 2022-04-04 Eunji Kim , Siwon Kim , Jungbeom Lee , Hyunwoo Kim , Sungroh Yoon

Existing method generates class activation map (CAM) by a set of fixed classes (i.e., using all the classes), while the discriminative cues between class pairs are not considered. Note that activation maps by considering different class…

Computer Vision and Pattern Recognition · Computer Science 2019-01-24 Fanman Meng , Kaixu Huang , Hongliang Li , Qingbo Wu

Accurate segmentation of the fetal brain from Magnetic Resonance Image (MRI) is important for prenatal assessment of fetal development. Although deep learning has shown the potential to achieve this task, it requires a large fine annotated…

Computer Vision and Pattern Recognition · Computer Science 2023-12-29 Jia Fu , Tao Lu , Shaoting Zhang , Guotai Wang

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

Class activation mapping~(CAM), a visualization technique for interpreting deep learning models, is now commonly used for weakly supervised semantic segmentation~(WSSS) and object localization~(WSOL). It is the weighted aggregation of the…

Computer Vision and Pattern Recognition · Computer Science 2023-09-08 Jiatai Lin , Guoqiang Han , Xuemiao Xu , Changhong Liang , Tien-Tsin Wong , C. L. Philip Chen , Zaiyi Liu , Chu Han

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

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

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

Class activation map (CAM) highlights regions of classes based on classification network, which is widely used in weakly supervised tasks. However, it faces the problem that the class activation regions are usually small and local. Although…

Computer Vision and Pattern Recognition · Computer Science 2019-09-24 Kaixu Huang , Fanman Meng , Hongliang Li , Shuai Chen , Qingbo Wu , King N. Ngan

Extracting class activation maps (CAM) from a classification model often results in poor coverage on foreground objects, i.e., only the discriminative region (e.g., the "head" of "sheep") is recognized and the rest (e.g., the "leg" of…

Computer Vision and Pattern Recognition · Computer Science 2023-03-21 Zhaozheng Chen , Qianru Sun

Class Activation Mapping (CAM) methods have recently gained much attention for weakly-supervised object localization (WSOL) tasks. They allow for CNN visualization and interpretation without training on fully annotated image datasets. CAM…

Computer Vision and Pattern Recognition · Computer Science 2021-10-22 Soufiane Belharbi , Aydin Sarraf , Marco Pedersoli , Ismail Ben Ayed , Luke McCaffrey , Eric Granger

Interpreting complex deep networks, notably pre-trained vision-language models (VLMs), is a formidable challenge. Current Class Activation Map (CAM) methods highlight regions revealing the model's decision-making basis but lack clear…

Computer Vision and Pattern Recognition · Computer Science 2024-05-30 Yuguang Yang , Runtang Guo , Sheng Wu , Yimi Wang , Linlin Yang , Bo Fan , Jilong Zhong , Juan Zhang , Baochang Zhang
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