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Open-vocabulary Video Instance Segmentation (OpenVIS) can simultaneously detect, segment, and track arbitrary object categories in a video, without being constrained to categories seen during training. In this work, we propose InstFormer, a…

Computer Vision and Pattern Recognition · Computer Science 2024-08-20 Pinxue Guo , Tony Huang , Peiyang He , Xuefeng Liu , Tianjun Xiao , Zhaoyu Chen , Wenqiang Zhang

The landscape of publicly available vision foundation models (VFMs), such as CLIP and Segment Anything Model (SAM), is expanding rapidly. VFMs are endowed with distinct capabilities stemming from their pre-training objectives. For instance,…

Event cameras offer advantages in object detection tasks due to high-speed response, low latency, and robustness to motion blur. However, event cameras lack texture and color information, making open-vocabulary detection particularly…

Computer Vision and Pattern Recognition · Computer Science 2026-03-12 Jinchang Zhang , Zijun Li , Jiakai Lin , Guoyu Lu

Audio-visual segmentation aims to separate sounding objects from videos by predicting pixel-level masks based on audio signals. Existing methods primarily concentrate on closed-set scenarios and direct audio-visual alignment and fusion,…

Machine Learning · Computer Science 2026-03-31 Shengkai Chen , Yifang Yin , Jinming Cao , Shili Xiang , Zhenguang Liu , Roger Zimmermann

Understanding objects in videos in terms of fine-grained localization masks and detailed semantic properties is a fundamental task in video understanding. In this paper, we propose VoCap, a flexible video model that consumes a video and a…

Computer Vision and Pattern Recognition · Computer Science 2025-09-01 Jasper Uijlings , Xingyi Zhou , Xiuye Gu , Arsha Nagrani , Anurag Arnab , Alireza Fathi , David Ross , Cordelia Schmid

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

This work aims to leverage pre-trained foundation models, such as contrastive language-image pre-training (CLIP) and segment anything model (SAM), to address weakly supervised semantic segmentation (WSSS) using image-level labels. To this…

Computer Vision and Pattern Recognition · Computer Science 2023-12-12 Xiaobo Yang , Xiaojin Gong

This work proposes POMP, a prompt pre-training method for vision-language models. Being memory and computation efficient, POMP enables the learned prompt to condense semantic information for a rich set of visual concepts with over…

Computer Vision and Pattern Recognition · Computer Science 2023-10-10 Shuhuai Ren , Aston Zhang , Yi Zhu , Shuai Zhang , Shuai Zheng , Mu Li , Alex Smola , Xu Sun

Open world image segmentation aims to achieve precise segmentation and semantic understanding of targets within images by addressing the infinitely open set of object categories encountered in the real world. However, traditional closed-set…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Danyang Li , Tianhao Wu , Bin Li , Zhenyuan Chen , Yang Zhang , Yuxuan Li , Ming-Ming Cheng , Xiang Li

We introduce Patch Aligned Contrastive Learning (PACL), a modified compatibility function for CLIP's contrastive loss, intending to train an alignment between the patch tokens of the vision encoder and the CLS token of the text encoder.…

Computer Vision and Pattern Recognition · Computer Science 2022-12-12 Jishnu Mukhoti , Tsung-Yu Lin , Omid Poursaeed , Rui Wang , Ashish Shah , Philip H. S. Torr , Ser-Nam Lim

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

Promptable foundation models such as the Segment Anything Model (SAM) produce high-quality masks but remain semantically blind, relying on external prompts to specify categories. Existing vision-language approaches address this limitation…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Shayan Jalilian , Abdul Bais

Pre-trained vision-language models~(VLMs) are the de-facto foundation models for various downstream tasks. However, scene text recognition methods still prefer backbones pre-trained on a single modality, namely, the visual modality, despite…

Computer Vision and Pattern Recognition · Computer Science 2024-12-25 Shuai Zhao , Ruijie Quan , Linchao Zhu , Yi Yang

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

Open-vocabulary segmentation models often struggle to generalize to unseen combinations of object categories and attributes, because fine-grained descriptions are typically encoded as holistic sentences that entangle multiple semantic…

Computer Vision and Pattern Recognition · Computer Science 2026-05-18 Chenhao Wang , Yingrui Ji , Yu Meng , Yao Zhu

Open-Vocabulary Video Instance Segmentation (VIS) is attracting increasing attention due to its ability to segment and track arbitrary objects. However, the recent Open-Vocabulary VIS attempts obtained unsatisfactory results, especially in…

Computer Vision and Pattern Recognition · Computer Science 2024-07-15 Hao Fang , Peng Wu , Yawei Li , Xinxin Zhang , Xiankai Lu

Vision-language models such as CLIP have boosted the performance of open-vocabulary object detection, where the detector is trained on base categories but required to detect novel categories. Existing methods leverage CLIP's strong…

Computer Vision and Pattern Recognition · Computer Science 2023-09-06 Cheng Shi , Sibei Yang

We present Fast Language-Image Pre-training (FLIP), a simple and more efficient method for training CLIP. Our method randomly masks out and removes a large portion of image patches during training. Masking allows us to learn from more…

Computer Vision and Pattern Recognition · Computer Science 2023-03-31 Yanghao Li , Haoqi Fan , Ronghang Hu , Christoph Feichtenhofer , Kaiming He

This paper studies the problem of weakly open-vocabulary semantic segmentation (WOVSS), which learns to segment objects of arbitrary classes using mere image-text pairs. Existing works turn to enhance the vanilla vision transformer by…

Computer Vision and Pattern Recognition · Computer Science 2023-10-31 Fei Zhang , Tianfei Zhou , Boyang Li , Hao He , Chaofan Ma , Tianjiao Zhang , Jiangchao Yao , Ya Zhang , Yanfeng Wang

This paper presents DetCLIPv2, an efficient and scalable training framework that incorporates large-scale image-text pairs to achieve open-vocabulary object detection (OVD). Unlike previous OVD frameworks that typically rely on a…

Computer Vision and Pattern Recognition · Computer Science 2023-04-11 Lewei Yao , Jianhua Han , Xiaodan Liang , Dan Xu , Wei Zhang , Zhenguo Li , Hang Xu