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Upscaled video detection is a helpful tool in multimedia forensics, but it is a challenging task that involves various upscaling and compression algorithms. There are many resolution-enhancement methods, including interpolation and…

Computer Vision and Pattern Recognition · Computer Science 2022-05-24 Viacheslav Meshchaninov , Ivan Molodetskikh , Dmitriy Vatolin

Partially-supervised instance segmentation is a task which requests segmenting objects from novel unseen categories via learning on limited seen categories with annotated masks thus eliminating demands of heavy annotation burden. The key to…

Computer Vision and Pattern Recognition · Computer Science 2022-03-25 Xuehui Wang , Kai Zhao , Ruixin Zhang , Shouhong Ding , Yan Wang , Wei Shen

Unsupervised disentangled representation learning is a long-standing problem in computer vision. This work proposes a novel framework for performing image clustering from deep embeddings by combining instance-level contrastive learning with…

Machine Learning · Computer Science 2021-10-05 Ramakrishnan Sundareswaran , Jansel Herrera-Gerena , John Just , Ali Jannesari

Polyphonic sound event detection (polyphonic SED) is an interesting but challenging task due to the concurrence of multiple sound events. Recently, SED methods based on convolutional neural networks (CNN) and recurrent neural networks (RNN)…

Audio and Speech Processing · Electrical Eng. & Systems 2018-07-24 Yaming Liu , Jian Tang , Yan Song , Lirong Dai

There is extensive interest in metric learning methods for image retrieval. Many metric learning loss functions focus on learning a correct ranking of training samples, but strongly overfit semantically inconsistent labels and require a…

Machine Learning · Computer Science 2023-06-05 Christopher Liao , Theodoros Tsiligkaridis , Brian Kulis

This paper addresses the challenges of complex dependencies and diverse anomaly patterns in cloud service environments by proposing a dependency modeling and anomaly detection method that integrates contrastive learning. The method…

Machine Learning · Computer Science 2025-10-16 Yue Xing , Yingnan Deng , Heyao Liu , Ming Wang , Yun Zi , Xiaoxuan Sun

Learning how objects sound from video is challenging, since they often heavily overlap in a single audio channel. Current methods for visually-guided audio source separation sidestep the issue by training with artificially mixed video…

Computer Vision and Pattern Recognition · Computer Science 2019-08-22 Ruohan Gao , Kristen Grauman

Unsupervised feature learning methods have proven effective for classification tasks based on a single modality. We present multimodal sparse coding for learning feature representations shared across multiple modalities. The shared…

Machine Learning · Computer Science 2016-05-18 Youngjune Gwon , William Campbell , Kevin Brady , Douglas Sturim , Miriam Cha , H. T. Kung

We propose a multi-label multi-task framework based on a convolutional recurrent neural network to unify detection of isolated and overlapping audio events. The framework leverages the power of convolutional recurrent neural network…

Machine Learning · Computer Science 2019-02-20 Huy Phan , Oliver Y. Chén , Philipp Koch , Lam Pham , Ian McLoughlin , Alfred Mertins , Maarten De Vos

Deep anomaly detection methods learn representations that separate between normal and anomalous images. Although self-supervised representation learning is commonly used, small dataset sizes limit its effectiveness. It was previously shown…

Computer Vision and Pattern Recognition · Computer Science 2022-11-29 Tal Reiss , Yedid Hoshen

Learning meaningful frame-wise features on a partially labeled dataset is crucial to semi-supervised sound event detection. Prior works either maintain consistency on frame-level predictions or seek feature-level similarity among…

Audio and Speech Processing · Electrical Eng. & Systems 2023-09-18 Yiming Li , Xiangdong Wang , Hong Liu , Rui Tao , Long Yan , Kazushige Ouchi

We propose a new contrastive objective for learning overcomplete pixel-level features that are invariant to motion blur. Other invariances (e.g., pose, illumination, or weather) can be learned by applying the corresponding transformations…

Computer Vision and Pattern Recognition · Computer Science 2024-11-04 Leonid Pogorelyuk , Stefan T. Radev

Unsupervised learning methods for feature extraction are becoming more and more popular. We combine the popular contrastive learning method (prototypical contrastive learning) and the classic representation learning method (autoencoder) to…

Computer Vision and Pattern Recognition · Computer Science 2022-05-11 Zeyu Cao , Xiaorun Li , Liaoying Zhao

Neural network based speech recognition systems suffer from performance degradation due to accented speech, especially unfamiliar accents. In this paper, we study the supervised contrastive learning framework for accented speech…

Sound · Computer Science 2021-07-05 Tao Han , Hantao Huang , Ziang Yang , Wei Han

Contrastive learning produces coherent semantic feature embeddings by encouraging positive samples to cluster closely while separating negative samples. However, existing contrastive learning methods lack principled guarantees on coverage…

Machine Learning · Computer Science 2026-03-30 Yahya Alkhatib , Wee Peng Tay

The deployment of machine listening algorithms in real-life applications is often impeded by a domain shift caused for instance by different microphone characteristics. In this paper, we propose a novel domain adaptation strategy based on…

Audio and Speech Processing · Electrical Eng. & Systems 2021-10-27 Jakob Abeßer , Meinard Müller

Domain mismatch problem caused by speaker-unrelated feature has been a major topic in speaker recognition. In this paper, we propose an explicit disentanglement framework to unravel speaker-relevant features from speaker-unrelated features…

Audio and Speech Processing · Electrical Eng. & Systems 2022-10-13 Sung Hwan Mun , Min Hyun Han , Minchan Kim , Dongjune Lee , Nam Soo Kim

Current Semi-Supervised Object Detection (SSOD) methods enhance detector performance by leveraging large amounts of unlabeled data, assuming that both labeled and unlabeled data share the same label space. However, in open-set scenarios,…

Computer Vision and Pattern Recognition · Computer Science 2024-12-04 Xinhao Zhong , Siyu Jiao , Yao Zhao , Yunchao Wei

Image harmonization task aims at harmonizing different composite foreground regions according to specific background image. Previous methods would rather focus on improving the reconstruction ability of the generator by some internal…

Computer Vision and Pattern Recognition · Computer Science 2022-12-14 Jingtang Liang , Chi-Man Pun

Stereo matching under foggy scenes remains a challenging task since the scattering effect degrades the visibility and results in less distinctive features for dense correspondence matching. While some previous learning-based methods…

Computer Vision and Pattern Recognition · Computer Science 2024-03-07 Zihua Liu , Yizhou Li , Masatoshi Okutomi