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Sanghyuk Chun

34 accepted papers

2025

An Efficient Post-hoc Framework for Reducing Task Discrepancy of Text Encoders for Composed Image Retrieval

ICCV 2025poster

Composed Image Retrieval (CIR) aims to retrieve a target image based on a reference image and conditioning text, enabling controllable image searches. The mainstream Zero-Shot (ZS) CIR methods bypass the need for expensive training CIR triplets by projecting image embeddings into the text token embe…

2025

Read, Watch and Scream! Sound Generation from Text and Video

AAAI 2025technical

Despite the impressive progress of multimodal generative models, video-to-audio generation still suffers from limited performance and limits the flexibility to prioritize sound synthesis for specific objects within the scene. Conversely, text-to-audio generation methods generate high-quality audio b…

2024

Do Counterfactually Fair Image Classifiers Satisfy Group Fairness? -- A Theoretical and Empirical Study

NeurIPS 2024poster

The notion of algorithmic fairness has been actively explored from various aspects of fairness, such as counterfactual fairness (CF) and group fairness (GF). However, the exact relationship between CF and GF remains to be unclear, especially in image classification tasks; the reason is because we of…

Cited by 3SourcePDFScholar
2024

HYPE: Hyperbolic Entailment Filtering for Underspecified Images and Texts

ECCV 2024oral

"In an era where the volume of data drives the effectiveness of self-supervised learning, the specificity and clarity of data semantics play a crucial role in model training. Addressing this, we introduce HYPerbolic Entailment filtering (HYPE), a novel methodology designed to meticulously extract mo…

2024

Language-only Training of Zero-shot Composed Image Retrieval

CVPR 2024poster

Composed image retrieval (CIR) task takes a composed query of image and text aiming to search relative images for both conditions. Conventional CIR approaches need a training dataset composed of triplets of query image query text and target image which is very expensive to collect. Several recent wo…

2024

Learning with Unmasked Tokens Drives Stronger Vision Learners

ECCV 2024poster

"Masked image modeling (MIM) has become a leading self-supervised learning strategy. MIMs such as Masked Autoencoder (MAE) learn strong representations by randomly masking input tokens for the encoder to process, with the decoder reconstructing the masked tokens to the input. However, MIM pre-traine…

2024

Toward Interactive Regional Understanding in Vision-Large Language Models

NAACL 2024long

Recent Vision-Language Pre-training (VLP) models have demonstrated significant advancements. Nevertheless, these models heavily rely on image-text pairs that capture only coarse and global information of an image, leading to a limitation in their regional understanding ability. In this work, we intr…

Cited by 1SourcePDFScholar
2023

Re-weighting Based Group Fairness Regularization via Classwise Robust Optimization

ICLR 2023poster

Many existing group fairness-aware training methods aim to achieve the group fairness by either re-weighting underrepresented groups based on certain rules or using weakly approximated surrogates for the fairness metrics in the objective as regularization terms. Although each of the learning schemes…

Cited by 24SourcePDFScholar
2023

SeiT: Storage-Efficient Vision Training with Tokens Using 1% of Pixel Storage

ICCV 2023poster

We need billion-scale images to achieve more generalizable and ground-breaking vision models, as well as massive dataset storage to ship the images (e.g., the LAION-4B dataset needs 240TB storage space). However, it has become challenging to deal with unlimited dataset storage with limited storage i…

Cited by 10PDFcodeScholar
2022

A Unified Analysis of Mixed Sample Data Augmentation: A Loss Function Perspective

NeurIPS 2022accept

We propose the first unified theoretical analysis of mixed sample data augmentation (MSDA), such as Mixup and CutMix. Our theoretical results show that regardless of the choice of the mixing strategy, MSDA behaves as a pixel-level regularization of the underlying training loss and a regularization o…

2022

Dataset Condensation with Contrastive Signals

ICML 2022spotlight

Recent studies have demonstrated that gradient matching-based dataset synthesis, or dataset condensation (DC), methods can achieve state-of-theart performance when applied to data-efficient learning tasks. However, in this study, we prove that the existing DC methods can perform worse than the rando…

2022

Domain Generalization by Mutual-Information Regularization with Pre-trained Models

ECCV 2022poster

"Domain generalization (DG) aims to learn a generalized model to an unseen target domain using only limited source domains. Previous attempts to DG fail to learn domain-invariant representations only from the source domains due to the significant domain shifts between training and test domains. Inst…

2022

ECCV Caption: Correcting False Negatives by Collecting Machine-and-Human-Verified Image-Caption Associations for MS-COCO

ECCV 2022poster

"Image-Text matching (ITM) is a common task for evaluating the quality of Vision and Language (VL) models. However, existing ITM benchmarks have a significant limitation. They have many missing correspondences, originating from the data construction process itself. For example, a caption is only mat…

2022

ViDT: An Efficient and Effective Fully Transformer-based Object Detector

ICLR 2022poster

Transformers are transforming the landscape of computer vision, especially for recognition tasks. Detection transformers are the first fully end-to-end learning systems for object detection, while vision transformers are the first fully transformer-based architecture for image classification. In thi…

2022

Which Shortcut Cues Will DNNs Choose? A Study from the Parameter-Space Perspective

ICLR 2022poster

Deep neural networks (DNNs) often rely on easy–to–learn discriminatory features, or cues, that are not necessarily essential to the problem at hand. For example, ducks in an image may be recognized based on their typical background scenery, such as lakes or streams. This phenomenon, also known as sh…

Cited by 60SourcePDFScholar
2021

AdamP: Slowing Down the Slowdown for Momentum Optimizers on Scale-invariant Weights

ICLR 2021poster

Normalization techniques, such as batch normalization (BN), are a boon for modern deep learning. They let weights converge more quickly with often better generalization performances. It has been argued that the normalization-induced scale invariance among the weights provides an advantageous ground…

2021

Few-shot Font Generation with Localized Style Representations and Factorization

AAAI 2021technical

Automatic few-shot font generation is a practical and widely studied problem because manual designs are expensive and sensitive to the expertise of designers. Existing few-shot font generation methods aim to learn to disentangle the style and content element from a few reference glyphs, and mainly f…

2021

Multiple Heads Are Better Than One: Few-Shot Font Generation With Multiple Localized Experts

ICCV 2021poster

A few-shot font generation (FFG) method has to satisfy two objectives: the generated images should preserve the underlying global structure of the target character and present the diverse local reference style. Existing FFG methods aim to disentangle content and style either by extracting a universa…

Cited by 100PDFcodeScholar
2021

Neural Hybrid Automata: Learning Dynamics With Multiple Modes and Stochastic Transitions

NeurIPS 2021poster

Effective control and prediction of dynamical systems require appropriate handling of continuous-time and discrete, event-triggered processes. Stochastic hybrid systems (SHSs), common across engineering domains, provide a formalism for dynamical systems subject to discrete, possibly stochastic, stat…

Cited by 13SourcePDFScholar
2021

Probabilistic Embeddings for Cross-Modal Retrieval

CVPR 2021poster

Cross-modal retrieval methods build a common representation space for samples from multiple modalities, typically from the vision and the language domains. For images and their captions, the multiplicity of the correspondences makes the task particularly challenging. Given an image (respectively a c…

Cited by 275PDFcodeScholar
2021

Re-Labeling ImageNet: From Single to Multi-Labels, From Global to Localized Labels

CVPR 2021poster

ImageNet has been the most popular image classification benchmark, but it is also the one with a significant level of label noise. Recent studies have shown that many samples contain multiple classes, despite being assumed to be a single-label benchmark. They have thus proposed to turn ImageNet eval…

Cited by 183PDFcodeScholar
2021

Rethinking Spatial Dimensions of Vision Transformers

ICCV 2021poster

Vision Transformer (ViT) extends the application range of transformers from language processing to computer vision tasks as being an alternative architecture against the existing convolutional neural networks (CNN). Since the transformer-based architecture has been innovative for computer vision mod…

Cited by 761PDFcodeScholar
2021

SWAD: Domain Generalization by Seeking Flat Minima

NeurIPS 2021poster

Domain generalization (DG) methods aim to achieve generalizability to an unseen target domain by using only training data from the source domains. Although a variety of DG methods have been proposed, a recent study shows that under a fair evaluation protocol, called DomainBed, the simple empirical r…

2020

Evaluating Weakly Supervised Object Localization Methods Right

CVPR 2020poster

Weakly-supervised object localization (WSOL) has gained popularity over the last years for its promise to train localization models with only image-level labels. Since the seminal WSOL work of class activation mapping (CAM), the field has focused on how to expand the attention regions to cover objec…

Cited by 237PDFcodeScholar
2020

Few-shot Compositional Font Generation with Dual Memory

ECCV 2020poster

Generating a new font library is a very labor-intensive and time-consuming job for glyph-rich scripts. Despite the remarkable success of existing font generation methods, they have significant drawbacks; they require a large number of reference images to generate a new font set, or they fail to capt…

2020

Learning De-biased Representations with Biased Representations

ICML 2020poster

Many machine learning algorithms are trained and evaluated by splitting data from a single source into training and test sets. While such focus on in-distribution learning scenarios has led to interesting advancement, it has not been able to tell if models are relying on dataset biases as shortcuts…

2019

CutMix: Regularization Strategy to Train Strong Classifiers With Localizable Features

ICCV 2019oral

Regional dropout strategies have been proposed to enhance performance of convolutional neural network classifiers. They have proved to be effective for guiding the model to attend on less discriminative parts of objects (e.g. leg as opposed to head of a person), thereby letting the network generaliz…

Cited by 6589PDFcodeScholar
2019

Photorealistic Style Transfer via Wavelet Transforms

ICCV 2019poster

Recent style transfer models have provided promising artistic results. However, given a photograph as a reference style, existing methods are limited by spatial distortions or unrealistic artifacts, which should not happen in real photographs. We introduce a theoretically sound correction to the net…

Cited by 426PDFcodeScholar