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Semi-supervised learning (SSL), which aims at leveraging a few labeled images and a large number of unlabeled images for network training, is beneficial for relieving the burden of data annotation in medical image segmentation. According to…

Image and Video Processing · Electrical Eng. & Systems 2022-02-15 Xinkai Zhao , Chaowei Fang , De-Jun Fan , Xutao Lin , Feng Gao , Guanbin Li

Contrastively trained vision-language models have achieved remarkable progress in vision and language representation learning, leading to state-of-the-art models for various downstream multimodal tasks. However, recent research has…

Computation and Language · Computer Science 2023-10-26 Harman Singh , Pengchuan Zhang , Qifan Wang , Mengjiao Wang , Wenhan Xiong , Jingfei Du , Yu Chen

Medical image segmentation plays an important role in clinical decision making, treatment planning, and disease tracking. However, it still faces two major challenges. On the one hand, there is often a ``soft boundary'' between foreground…

Image and Video Processing · Electrical Eng. & Systems 2024-12-12 Mengqi Lei , Haochen Wu , Xinhua Lv , Xin Wang

Contrastive learning has become an important tool in learning representations from unlabeled data mainly relying on the idea of minimizing distance between positive data pairs, e.g., views from the same images, and maximizing distance…

Computer Vision and Pattern Recognition · Computer Science 2023-08-22 Nina Shvetsova , Felix Petersen , Anna Kukleva , Bernt Schiele , Hilde Kuehne

Contrastive learning has shown promising potential in self-supervised spatio-temporal representation learning. Most works naively sample different clips to construct positive and negative pairs. However, we observe that this formulation…

Computer Vision and Pattern Recognition · Computer Science 2022-07-13 Shuangrui Ding , Rui Qian , Hongkai Xiong

Accurate and robust image-based geo-localization at a global scale is challenging due to diverse environments, visually ambiguous scenes, and the lack of distinctive landmarks in many regions. While contrastive learning methods show…

Computer Vision and Pattern Recognition · Computer Science 2025-09-29 Boyi Chen , Zhangyu Wang , Fabian Deuser , Johann Maximilian Zollner , Martin Werner

Ensuring the realism of computer-generated synthetic images is crucial to deep neural network (DNN) training. Due to different semantic distributions between synthetic and real-world captured datasets, there exists semantic mismatch between…

Computer Vision and Pattern Recognition · Computer Science 2023-04-27 Ganning Zhao , Tingwei Shen , Suya You , C. -C. Jay Kuo

Image composition is a fundamental operation in image editing field. However, unharmonious foreground and background downgrade the quality of composite image. Image harmonization, which adjusts the foreground to improve the consistency, is…

Computer Vision and Pattern Recognition · Computer Science 2021-04-06 Wenyan Cong , Li Niu , Jianfu Zhang , Jing Liang , Liqing Zhang

Estimating continuous optical flow is a fundamental yet challenging problem in dynamic visual perception. Event-based cameras, with microsecond latency and high dynamic range, capture brightness changes asynchronously, offering a unique…

Computer Vision and Pattern Recognition · Computer Science 2026-05-27 Rui Hu , Song Wu , Wen Yang , Jinjian Wu

Asymmetric appearance between positive pair effectively reduces the risk of representation degradation in contrastive learning. However, there are still a mass of appearance similarities between positive pair constructed by the existing…

Computer Vision and Pattern Recognition · Computer Science 2023-06-06 Chengchao Shen , Jianzhong Chen , Shu Wang , Hulin Kuang , Jin Liu , Jianxin Wang

Few-shot learning aims to transfer information from one task to enable generalization on novel tasks given a few examples. This information is present both in the domain and the class labels. In this work we investigate the complementary…

Computer Vision and Pattern Recognition · Computer Science 2021-06-23 Orchid Majumder , Avinash Ravichandran , Subhransu Maji , Alessandro Achille , Marzia Polito , Stefano Soatto

We study the problem of learning to assign a characteristic pose, i.e., scale and orientation, for an image region of interest. Despite its apparent simplicity, the problem is non-trivial; it is hard to obtain a large-scale set of image…

Computer Vision and Pattern Recognition · Computer Science 2022-06-16 Jongmin Lee , Yoonwoo Jeong , Minsu Cho

Most of previous deepfake detection researches bent their efforts to describe and discriminate artifacts in human perceptible ways, which leave a bias in the learned networks of ignoring some critical invariance features intra-class and…

Computer Vision and Pattern Recognition · Computer Science 2022-05-17 Ruiqi Zha , Zhichao Lian , Qianmu Li , Siqi Gu

Medical image classification has been widely adopted in medical image analysis. However, due to the difficulty of collecting and labeling data in the medical area, medical image datasets are usually highly-imbalanced. To address this…

Computer Vision and Pattern Recognition · Computer Science 2022-09-02 Zhixiong Yang , Junwen Pan , Yanzhan Yang , Xiaozhou Shi , Hong-Yu Zhou , Zhicheng Zhang , Cheng Bian

Current multimodal models leveraging contrastive learning often face limitations in developing fine-grained conceptual understanding. This is due to random negative samples during pretraining, causing almost exclusively very dissimilar…

Computer Vision and Pattern Recognition · Computer Science 2024-08-06 Philipp J. Rösch , Norbert Oswald , Michaela Geierhos , Jindřich Libovický

We developed a novel SSL approach to capture global consistency and pixel-level local consistencies between differently augmented views of the same images to accommodate downstream discriminative and dense predictive tasks. We adopted the…

Computer Vision and Pattern Recognition · Computer Science 2022-10-04 Zhuangzhuang Zhang , Weixiong Zhang

The Composed Image Retrieval (CIR) task aims to retrieve target images using a composed query consisting of a reference image and a modified text. Advanced methods often utilize contrastive learning as the optimization objective, which…

Computer Vision and Pattern Recognition · Computer Science 2024-08-08 Zhangchi Feng , Richong Zhang , Zhijie Nie

Contrastive Language-Image Pre-training (CLIP) achieves remarkable performance in various downstream tasks through the alignment of image and text input embeddings and holds great promise for anomaly detection. However, our empirical…

Computer Vision and Pattern Recognition · Computer Science 2024-07-25 Adam Goodge , Bryan Hooi , Wee Siong Ng

This work presents a novel framework CISFA (Contrastive Image synthesis and Self-supervised Feature Adaptation)that builds on image domain translation and unsupervised feature adaptation for cross-modality biomedical image segmentation.…

Computer Vision and Pattern Recognition · Computer Science 2023-09-04 Xinrong Hu , Corey Wang , Yiyu Shi

Contrastive learning has become a key component of self-supervised learning approaches for computer vision. By learning to embed two augmented versions of the same image close to each other and to push the embeddings of different images…

Computer Vision and Pattern Recognition · Computer Science 2020-12-07 Yannis Kalantidis , Mert Bulent Sariyildiz , Noe Pion , Philippe Weinzaepfel , Diane Larlus