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Open-vocabulary semantic segmentation (OVSS) extends traditional closed-set segmentation by enabling pixel-wise annotation for both seen and unseen categories using arbitrary textual descriptions. While existing methods leverage…

Computer Vision and Pattern Recognition · Computer Science 2026-02-13 Junyang Chen , Xiangbo Lv , Zhiqiang Kou , Xingdong Sheng , Ning Xu , Yiguo Qiao

Existing instance segmentation models learn task-specific information using manual mask annotations from base (training) categories. These mask annotations require tremendous human effort, limiting the scalability to annotate novel (new)…

Computer Vision and Pattern Recognition · Computer Science 2023-03-30 Vibashan VS , Ning Yu , Chen Xing , Can Qin , Mingfei Gao , Juan Carlos Niebles , Vishal M. Patel , Ran Xu

Open-vocabulary semantic segmentation (OVSS) aims to segment objects from arbitrary text categories without requiring densely annotated datasets. Although contrastive learning based models enable zero-shot segmentation, they often lose fine…

Computer Vision and Pattern Recognition · Computer Science 2026-04-30 Huy Che , Vinh-Tiep Nguyen

Open-vocabulary semantic segmentation requires models to effectively integrate visual representations with open-vocabulary semantic labels. While Contrastive Language-Image Pre-training (CLIP) models shine in recognizing visual concepts…

Computer Vision and Pattern Recognition · Computer Science 2024-08-12 Mengcheng Lan , Chaofeng Chen , Yiping Ke , Xinjiang Wang , Litong Feng , Wayne Zhang

Open-vocabulary semantic segmentation (OVSS) is fundamentally hampered by the coarse, image-level representations of CLIP, which lack precise pixel-level details. Existing training-free methods attempt to resolve this by either importing…

Computer Vision and Pattern Recognition · Computer Science 2026-01-01 Ziquan Liu , Zhewei Zhu , Xuyang Shi

Diffusion models represent a new paradigm in text-to-image generation. Beyond generating high-quality images from text prompts, models such as Stable Diffusion have been successfully extended to the joint generation of semantic segmentation…

Computer Vision and Pattern Recognition · Computer Science 2024-06-18 Pablo Marcos-Manchón , Roberto Alcover-Couso , Juan C. SanMiguel , Jose M. Martínez

Point-cloud semantic segmentation underpins a wide range of critical applications. Although recent deep architectures and large-scale datasets have driven impressive closed-set performance, these models struggle to recognize or properly…

Computer Vision and Pattern Recognition · Computer Science 2025-05-20 Wang Fang , Shirin Rahimi , Olivia Bennett , Sophie Carter , Mitra Hassani , Xu Lan , Omid Javadi , Lucas Mitchell

Contrastive Language-Image Pre-training (CLIP) has recently shown great promise in pixel-level zero-shot learning tasks. However, existing approaches utilizing CLIP's text and patch embeddings to generate semantic masks often misidentify…

Computer Vision and Pattern Recognition · Computer Science 2024-09-04 Jingyao Li , Pengguang Chen , Shengju Qian , Shu Liu , Jiaya Jia

Image segmentation beyond predefined categories is a key challenge in remote sensing, where novel and unseen classes often emerge during inference. Open-vocabulary image Segmentation addresses these generalization issues in traditional…

Computer Vision and Pattern Recognition · Computer Science 2025-04-15 Saikat Dutta , Akhil Vasim , Siddhant Gole , Hamid Rezatofighi , Biplab Banerjee

The pre-trained vision-language model, exemplified by CLIP, advances zero-shot semantic segmentation by aligning visual features with class embeddings through a transformer decoder to generate semantic masks. Despite its effectiveness,…

Computer Vision and Pattern Recognition · Computer Science 2024-03-14 Zicheng Zhang , Tong Zhang , Yi Zhu , Jianzhuang Liu , Xiaodan Liang , QiXiang Ye , Wei Ke

Open-vocabulary semantic segmentation attempts to classify and outline objects in an image using arbitrary text labels, including those unseen during training. Self-supervised learning resolves numerous visual and linguistic processing…

Computer Vision and Pattern Recognition · Computer Science 2025-07-03 Muhammad Atta ur Rahman , Dooseop Choi , Seung-Ik Lee , KyoungWook Min

Zero-shot classification capabilities naturally arise in models trained within a vision-language contrastive framework. Despite their classification prowess, these models struggle in dense tasks like zero-shot open-vocabulary segmentation.…

Computer Vision and Pattern Recognition · Computer Science 2025-10-16 Thomas Stegmüller , Tim Lebailly , Nikola Dukic , Behzad Bozorgtabar , Tinne Tuytelaars , Jean-Philippe Thiran

Current closed-set instance segmentation models rely on pre-defined class labels for each mask during training and evaluation, largely limiting their ability to detect novel objects. Open-world instance segmentation (OWIS) models address…

Computer Vision and Pattern Recognition · Computer Science 2023-08-15 Muzhi Zhu , Hengtao Li , Hao Chen , Chengxiang Fan , Weian Mao , Chenchen Jing , Yifan Liu , Chunhua Shen

Being able to segment unseen classes not observed during training is an important technical challenge in deep learning, because of its potential to reduce the expensive annotation required for semantic segmentation. Prior zero-label…

Computer Vision and Pattern Recognition · Computer Science 2021-04-26 Giuseppe Pastore , Fabio Cermelli , Yongqin Xian , Massimiliano Mancini , Zeynep Akata , Barbara Caputo

Instance segmentation of point clouds is a crucial task in 3D field with numerous applications that involve localizing and segmenting objects in a scene. However, achieving satisfactory results requires a large number of manual annotations,…

Computer Vision and Pattern Recognition · Computer Science 2024-06-18 Zhikai Zhang , Jian Ding , Li Jiang , Dengxin Dai , Gui-Song Xia

Existing dataset pruning techniques primarily focus on classification tasks, limiting their applicability to more complex and practical tasks like instance segmentation. Instance segmentation presents three key challenges: pixel-level…

Computer Vision and Pattern Recognition · Computer Science 2025-03-04 Yalun Dai , Lingao Xiao , Ivor W. Tsang , Yang He

Semantic Segmentation is one of the most challenging vision tasks, usually requiring large amounts of training data with expensive pixel level annotations. With the success of foundation models and especially vision-language models, recent…

Computer Vision and Pattern Recognition · Computer Science 2024-09-17 Soroush Seifi , Daniel Olmeda Reino , Fabien Despinoy , Rahaf Aljundi

CLIP (Contrastive Language-Image Pretraining) is well-developed for open-vocabulary zero-shot image-level recognition, while its applications in pixel-level tasks are less investigated, where most efforts directly adopt CLIP features…

Computer Vision and Pattern Recognition · Computer Science 2023-04-17 Jie Guo , Qimeng Wang , Yan Gao , Xiaolong Jiang , Xu Tang , Yao Hu , Baochang Zhang

Segmenting and recognizing diverse object parts is a crucial ability in applications spanning various computer vision and robotic tasks. While significant progress has been made in object-level Open-Vocabulary Semantic Segmentation (OVSS),…

Computer Vision and Pattern Recognition · Computer Science 2023-10-10 Meng Wei , Xiaoyu Yue , Wenwei Zhang , Shu Kong , Xihui Liu , Jiangmiao Pang

Vision-language (VL) pre-training has recently gained much attention for its transferability and flexibility in novel concepts (e.g., cross-modality transfer) across various visual tasks. However, VL-driven segmentation has been…

Computer Vision and Pattern Recognition · Computer Science 2023-03-28 Sukmin Yun , Seong Hyeon Park , Paul Hongsuck Seo , Jinwoo Shin