Search Results for author: Wonjong Rhee

Found 30 papers, 13 papers with code

On the Statistical and Information Theoretical Characteristics of DNN Representations

no code implementations ICLR 2019 Daeyoung Choi, Wonjong Rhee, Kyungeun Lee, Changho Shin

It has been common to argue or imply that a regularizer can be used to alter a statistical property of a hidden layer's representation and thus improve generalization or performance of deep networks.

An Image Grid Can Be Worth a Video: Zero-shot Video Question Answering Using a VLM

1 code implementation27 Mar 2024 Wonkyun Kim, Changin Choi, Wonseok Lee, Wonjong Rhee

Recently, an alternative strategy has surfaced, employing readily available foundation models, such as VideoLMs and LLMs, across multiple stages for modality bridging.

Language Modelling Multiple-choice +2

Improving Forward Compatibility in Class Incremental Learning by Increasing Representation Rank and Feature Richness

no code implementations22 Mar 2024 Jaeill Kim, Wonseok Lee, Moonjung Eo, Wonjong Rhee

Consequently, RFR achieves dual objectives in backward and forward compatibility: minimizing feature extractor modifications and enhancing novel task performance, respectively.

Class Incremental Learning Incremental Learning

Selectively Informative Description can Reduce Undesired Embedding Entanglements in Text-to-Image Personalization

no code implementations22 Mar 2024 Jimyeong Kim, Jungwon Park, Wonjong Rhee

In text-to-image personalization, a timely and crucial challenge is the tendency of generated images overfitting to the biases present in the reference images.

Disentanglement

Harmonizing Visual and Textual Embeddings for Zero-Shot Text-to-Image Customization

no code implementations21 Mar 2024 Yeji Song, Jimyeong Kim, Wonhark Park, Wonsik Shin, Wonjong Rhee, Nojun Kwak

In a surge of text-to-image (T2I) models and their customization methods that generate new images of a user-provided subject, current works focus on alleviating the costs incurred by a lengthy per-subject optimization.

On-Off Pattern Encoding and Path-Count Encoding as Deep Neural Network Representations

no code implementations17 Jan 2024 Euna Jung, Jaekeol Choi, Eunggu Yun, Wonjong Rhee

Specifically, we consider \textit{On-Off pattern} and \textit{PathCount} for investigating how information is stored in deep representations.

Image Classification

Enhancing Contrastive Learning with Efficient Combinatorial Positive Pairing

no code implementations11 Jan 2024 Jaeill Kim, Duhun Hwang, Eunjung Lee, Jangwon Suh, Jimyeong Kim, Wonjong Rhee

In the past few years, contrastive learning has played a central role for the success of visual unsupervised representation learning.

Contrastive Learning Representation Learning

A Differentiable Framework for End-to-End Learning of Hybrid Structured Compression

no code implementations21 Sep 2023 Moonjung Eo, Suhyun Kang, Wonjong Rhee

In this study, we develop a \textit{Differentiable Framework~(DF)} that can express filter selection, rank selection, and budget constraint into a single analytical formulation.

Scheduling

Towards a Rigorous Analysis of Mutual Information in Contrastive Learning

no code implementations30 Aug 2023 Kyungeun Lee, Jaeill Kim, Suhyun Kang, Wonjong Rhee

Contrastive learning has emerged as a cornerstone in recent achievements of unsupervised representation learning.

Contrastive Learning Misconceptions +1

VNE: An Effective Method for Improving Deep Representation by Manipulating Eigenvalue Distribution

1 code implementation CVPR 2023 Jaeill Kim, Suhyun Kang, Duhun Hwang, Jungwook Shin, Wonjong Rhee

Since the introduction of deep learning, a wide scope of representation properties, such as decorrelation, whitening, disentanglement, rank, isotropy, and mutual information, have been studied to improve the quality of representation.

Disentanglement Domain Generalization +7

Meta-Learning with a Geometry-Adaptive Preconditioner

1 code implementation CVPR 2023 Suhyun Kang, Duhun Hwang, Moonjung Eo, Taesup Kim, Wonjong Rhee

In this study, we propose Geometry-Adaptive Preconditioned gradient descent (GAP) that can overcome the limitations in MAML; GAP can efficiently meta-learn a preconditioner that is dependent on task-specific parameters, and its preconditioner can be shown to be a Riemannian metric.

Few-Shot Image Classification Few-Shot Learning

DR.CPO: Diversified and Realistic 3D Augmentation via Iterative Construction, Random Placement, and HPR Occlusion

1 code implementation20 Mar 2023 Jungwook Shin, Jaeill Kim, Kyungeun Lee, Hyunghun Cho, Wonjong Rhee

To improve the diversity of the whole-body object construction, we develop an iterative method that stochastically combines multiple objects observed from the real world into a single object.

3D Object Detection Autonomous Driving +3

Evaluating Feature Attribution Methods for Electrocardiogram

1 code implementation23 Nov 2022 Jangwon Suh, Jimyeong Kim, Euna Jung, Wonjong Rhee

The performance of cardiac arrhythmia detection with electrocardiograms(ECGs) has been considerably improved since the introduction of deep learning models.

Arrhythmia Detection

Isotropic Representation Can Improve Dense Retrieval

1 code implementation1 Sep 2022 Euna Jung, Jungwon Park, Jaekeol Choi, Sungyoon Kim, Wonjong Rhee

In particular, many of the high-performing dense retrieval models evaluate representations of query and document using BERT, and subsequently apply a cosine-similarity based scoring to determine the relevance.

Re-Ranking Retrieval

Finding Inverse Document Frequency Information in BERT

no code implementations24 Feb 2022 Jaekeol Choi, Euna Jung, Sungjun Lim, Wonjong Rhee

The traditional approach, however, is being rapidly replaced by Neural Ranking Models (NRMs) that can exploit semantic features.

Retrieval

A Highly Effective Low-Rank Compression of Deep Neural Networks with Modified Beam-Search and Modified Stable Rank

no code implementations30 Nov 2021 Moonjung Eo, Suhyun Kang, Wonjong Rhee

The resulting BSR (Beam-search and Stable Rank) algorithm requires only a single hyperparameter to be tuned for the desired compression ratio.

Low-rank compression Quantization

Semi-Siamese Bi-encoder Neural Ranking Model Using Lightweight Fine-Tuning

1 code implementation28 Oct 2021 Euna Jung, Jaekeol Choi, Wonjong Rhee

The results confirm that both lightweight fine-tuning and semi-Siamese are considerably helpful for improving BERT-based bi-encoders.

Language Modelling

Mutual Information Estimation as a Difference of Entropies for Unsupervised Representation Learning

no code implementations29 Sep 2021 Jaeill Kim, Wonjong Rhee

In this work, we derive a principled non-contrastive method where mutual information is estimated as a difference of entropies and thus no need for negative sampling.

Mutual Information Estimation Representation Learning

Improving Bi-encoder Document Ranking Models with Two Rankers and Multi-teacher Distillation

1 code implementation11 Mar 2021 Jaekeol Choi, Euna Jung, Jangwon Suh, Wonjong Rhee

When monoBERT is used as the cross-encoder teacher, together with either TwinBERT or ColBERT as the bi-encoder teacher, TRMD produces a student bi-encoder that performs better than the corresponding baseline bi-encoder.

Document Ranking

Short-term Traffic Prediction with Deep Neural Networks: A Survey

no code implementations28 Aug 2020 Kyungeun Lee, Moonjung Eo, Euna Jung, Yoonjin Yoon, Wonjong Rhee

2) We briefly explain a wide range of DNN techniques from the earliest networks, including Restricted Boltzmann Machines, to the most recent, including graph-based and meta-learning networks.

Meta-Learning Traffic Prediction

Interpreting Neural Ranking Models using Grad-CAM

no code implementations12 May 2020 Jaekeol Choi, Jungin Choi, Wonjong Rhee

However, explaining the ranking results has become even more difficult with NRM due to the complex structure of neural networks.

Interpretable Machine Learning

DDP-GCN: Multi-Graph Convolutional Network for Spatiotemporal Traffic Forecasting

2 code implementations29 May 2019 Kyungeun Lee, Wonjong Rhee

In this paper, we identify two essential spatial dependencies in traffic forecasting in addition to distance, direction and positional relationship, for designing basic graph elements as the fundamental building blocks.

Subtask Gated Networks for Non-Intrusive Load Monitoring

no code implementations16 Nov 2018 Changho Shin, Sunghwan Joo, Jaeryun Yim, Hyoseop Lee, Taesup Moon, Wonjong Rhee

In this work, we focus on the idea that appliances have on/off states, and develop a deep network for further performance improvements.

blind source separation General Classification +2

Statistical Characteristics of Deep Representations: An Empirical Investigation

no code implementations8 Nov 2018 Daeyoung Choi, Kyungeun Lee, Duhun Hwang, Wonjong Rhee

In this study, the effects of eight representation regularization methods are investigated, including two newly developed rank regularizers (RR).

Utilizing Class Information for Deep Network Representation Shaping

1 code implementation25 Sep 2018 Daeyoung Choi, Wonjong Rhee

Motivated by the idea, we design two class-wise regularizers that explicitly utilize class information: class-wise Covariance Regularizer (cw-CR) and class-wise Variance Regularizer (cw-VR).

General Classification

Restructuring Batch Normalization to Accelerate CNN Training

1 code implementation4 Jul 2018 Wonkyung Jung, Daejin Jung, and Byeongho Kim, Sunjung Lee, Wonjong Rhee, Jung Ho Ahn

Batch Normalization (BN) has become a core design block of modern Convolutional Neural Networks (CNNs).

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