Search Results for author: Uiwon Hwang

Found 14 papers, 6 papers with code

Efficient Diffusion-Driven Corruption Editor for Test-Time Adaptation

no code implementations16 Mar 2024 Yeongtak Oh, Jonghyun Lee, Jooyoung Choi, Dahuin Jung, Uiwon Hwang, Sungroh Yoon

To address this, we propose a novel TTA method by leveraging a latent diffusion model (LDM) based image editing model and fine-tuning it with our newly introduced corruption modeling scheme.

Data Augmentation Test-time Adaptation

SF(DA)$^2$: Source-free Domain Adaptation Through the Lens of Data Augmentation

1 code implementation16 Mar 2024 Uiwon Hwang, Jonghyun Lee, Juhyeon Shin, Sungroh Yoon

We construct an augmentation graph in the feature space of the pretrained model using the neighbor relationships between target features and propose spectral neighborhood clustering to identify partitions in the prediction space.

Data Augmentation Disentanglement +1

Entropy is not Enough for Test-Time Adaptation: From the Perspective of Disentangled Factors

no code implementations12 Mar 2024 Jonghyun Lee, Dahuin Jung, Saehyung Lee, Junsung Park, Juhyeon Shin, Uiwon Hwang, Sungroh Yoon

To mitigate it, TTA methods have utilized the model output's entropy as a confidence metric that aims to determine which samples have a lower likelihood of causing error.

Object Pseudo Label +1

Improving Diffusion-Based Generative Models via Approximated Optimal Transport

1 code implementation8 Mar 2024 Daegyu Kim, Jooyoung Choi, Chaehun Shin, Uiwon Hwang, Sungroh Yoon

Our approach aims to approximate and integrate optimal transport into the training process, significantly enhancing the ability of diffusion models to estimate the denoiser outputs accurately.

Image Generation

Gradient Alignment with Prototype Feature for Fully Test-time Adaptation

no code implementations14 Feb 2024 Juhyeon Shin, Jonghyun Lee, Saehyung Lee, MinJun Park, Dongjun Lee, Uiwon Hwang, Sungroh Yoon

In context of Test-time Adaptation(TTA), we propose a regularizer, dubbed Gradient Alignment with Prototype feature (GAP), which alleviates the inappropriate guidance from entropy minimization loss from misclassified pseudo label.

Pseudo Label Test-time Adaptation

On mitigating stability-plasticity dilemma in CLIP-guided image morphing via geodesic distillation loss

1 code implementation19 Jan 2024 Yeongtak Oh, Saehyung Lee, Uiwon Hwang, Sungroh Yoon

Large-scale language-vision pre-training models, such as CLIP, have achieved remarkable text-guided image morphing results by leveraging several unconditional generative models.

Image Morphing

Stein Latent Optimization for Generative Adversarial Networks

1 code implementation ICLR 2022 Uiwon Hwang, Heeseung Kim, Dahuin Jung, Hyemi Jang, Hyungyu Lee, Sungroh Yoon

Generative adversarial networks (GANs) with clustered latent spaces can perform conditional generation in a completely unsupervised manner.

Attribute

HexaGAN: Generative Adversarial Nets for Real World Classification

1 code implementation26 Feb 2019 Uiwon Hwang, Dahuin Jung, Sungroh Yoon

We evaluate the classification performance (F1-score) of the proposed method with 20% missingness and confirm up to a 5% improvement in comparison with the performance of combinations of state-of-the-art methods.

Classification General Classification +2

Deep Trustworthy Knowledge Tracing

no code implementations28 May 2018 Heonseok Ha, Uiwon Hwang, Yongjun Hong, Jahee Jang, Sungroh Yoon

Knowledge tracing (KT), a key component of an intelligent tutoring system, is a machine learning technique that estimates the mastery level of a student based on his/her past performance.

Knowledge Tracing

How Generative Adversarial Networks and Their Variants Work: An Overview

no code implementations16 Nov 2017 Yongjun Hong, Uiwon Hwang, Jaeyoon Yoo, Sungroh Yoon

Generative Adversarial Networks (GAN) have received wide attention in the machine learning field for their potential to learn high-dimensional, complex real data distribution.

Attribute Domain Adaptation +2

Adversarial Training for Disease Prediction from Electronic Health Records with Missing Data

no code implementations11 Nov 2017 Uiwon Hwang, Sungwoon Choi, Han-Byoel Lee, Sungroh Yoon

Electronic health records (EHRs) have contributed to the computerization of patient records and can thus be used not only for efficient and systematic medical services, but also for research on biomedical data science.

Disease Prediction Imputation +1

Polyphonic Music Generation with Sequence Generative Adversarial Networks

1 code implementation31 Oct 2017 Sang-gil Lee, Uiwon Hwang, Seonwoo Min, Sungroh Yoon

We propose an application of sequence generative adversarial networks (SeqGAN), which are generative adversarial networks for discrete sequence generation, for creating polyphonic musical sequences.

Sound Audio and Speech Processing

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