Search Results for author: Sunghyun Park

Found 35 papers, 14 papers with code

Dialogue Response Generation via Contrastive Latent Representation Learning

no code implementations EMNLP (NLP4ConvAI) 2021 Shuyang Dai, Guoyin Wang, Sunghyun Park, Sungjin Lee

In this work, we aim to construct a robust sentence representation learning model, that is specifically designed for dialogue response generation, with Transformer-based encoder-decoder structure.

Contrastive Learning Representation Learning +2

Reinforcement Learning from Reflective Feedback (RLRF): Aligning and Improving LLMs via Fine-Grained Self-Reflection

no code implementations21 Mar 2024 Kyungjae Lee, Dasol Hwang, Sunghyun Park, Youngsoo Jang, Moontae Lee

Despite the promise of RLHF in aligning LLMs with human preferences, it often leads to superficial alignment, prioritizing stylistic changes over improving downstream performance of LLMs.

Mathematical Reasoning

YTCommentQA: Video Question Answerability in Instructional Videos

1 code implementation30 Jan 2024 Saelyne Yang, Sunghyun Park, Yunseok Jang, Moontae Lee

Experiments with answerability classification tasks demonstrate the complexity of YTCommentQA and emphasize the need to comprehend the combined role of visual and script information in video reasoning.

Question Answering Video Question Answering

When Model Meets New Normals: Test-time Adaptation for Unsupervised Time-series Anomaly Detection

1 code implementation19 Dec 2023 Dongmin Kim, Sunghyun Park, Jaegul Choo

Time-series anomaly detection deals with the problem of detecting anomalous timesteps by learning normality from the sequence of observations.

Anomaly Detection Test-time Adaptation +2

StableVITON: Learning Semantic Correspondence with Latent Diffusion Model for Virtual Try-On

1 code implementation4 Dec 2023 Jeongho Kim, Gyojung Gu, Minho Park, Sunghyun Park, Jaegul Choo

Given a clothing image and a person image, an image-based virtual try-on aims to generate a customized image that appears natural and accurately reflects the characteristics of the clothing image.

Semantic correspondence Virtual Try-on

Expression Domain Translation Network for Cross-domain Head Reenactment

1 code implementation16 Oct 2023 Taewoong Kang, Jeongsik Oh, Jaeseong Lee, Sunghyun Park, Jaegul Choo

Specifically, to maintain the geometric consistency of expressions between the input and output of the expression domain translation network, we employ a 3D geometric-aware loss function that reduces the distances between the vertices in the 3D mesh of the human and anime.

Translation

Label Shift Adapter for Test-Time Adaptation under Covariate and Label Shifts

no code implementations ICCV 2023 Sunghyun Park, Seunghan Yang, Jaegul Choo, Sungrack Yun

Test-time adaptation (TTA) aims to adapt a pre-trained model to the target domain in a batch-by-batch manner during inference.

Test-time Adaptation

Reference-based Image Composition with Sketch via Structure-aware Diffusion Model

1 code implementation31 Mar 2023 Kangyeol Kim, Sunghyun Park, Junsoo Lee, Jaegul Choo

Recent remarkable improvements in large-scale text-to-image generative models have shown promising results in generating high-fidelity images.

Image Manipulation

Improving Scene Text Recognition for Character-Level Long-Tailed Distribution

no code implementations31 Mar 2023 Sunghyun Park, Sunghyo Chung, Jungsoo Lee, Jaegul Choo

However, STR models show a large performance degradation on languages with a numerous number of characters (e. g., Chinese and Korean), especially on characters that rarely appear due to the long-tailed distribution of characters in such languages.

Scene Text Recognition

RobustSwap: A Simple yet Robust Face Swapping Model against Attribute Leakage

no code implementations28 Mar 2023 Jaeseong Lee, Taewoo Kim, Sunghyun Park, Younggun Lee, Jaegul Choo

However, we observed that previous approaches still suffer from source attribute leakage, where the source image's attributes interfere with the target image's.

Attribute Face Swapping

Open World Classification with Adaptive Negative Samples

no code implementations9 Mar 2023 Ke Bai, Guoyin Wang, Jiwei Li, Sunghyun Park, Sungjin Lee, Puyang Xu, Ricardo Henao, Lawrence Carin

Open world classification is a task in natural language processing with key practical relevance and impact.

Classification

Ranking-Enhanced Unsupervised Sentence Representation Learning

1 code implementation9 Sep 2022 Yeon Seonwoo, Guoyin Wang, Changmin Seo, Sajal Choudhary, Jiwei Li, Xiang Li, Puyang Xu, Sunghyun Park, Alice Oh

In this work, we show that the semantic meaning of a sentence is also determined by nearest-neighbor sentences that are similar to the input sentence.

Contrastive Learning Data Augmentation +5

Data Augmentation using Random Image Cropping for High-resolution Virtual Try-On (VITON-CROP)

no code implementations16 Nov 2021 Taewon Kang, Sunghyun Park, Seunghwan Choi, Jaegul Choo

Image-based virtual try-on provides the capacity to transfer a clothing item onto a photo of a given person, which is usually accomplished by warping the item to a given human pose and adjusting the warped item to the person.

Data Augmentation Image Cropping +1

Collage: Seamless Integration of Deep Learning Backends with Automatic Placement

1 code implementation1 Nov 2021 Byungsoo Jeon, Sunghyun Park, Peiyuan Liao, Sheng Xu, Tianqi Chen, Zhihao Jia

Given the fast-evolving nature of the DL ecosystem, this manual approach often slows down continuous innovations across different layers; it prevents hardware vendors from the fast deployment of their cutting-edge libraries, DL framework developers must repeatedly adjust their hand-coded rules to accommodate new versions of libraries, and machine learning practitioners need to wait for the integration of new technologies and often encounter unsatisfactory performance.

Rethinking Generalization Performance of Surgical Phase Recognition with Expert-Generated Annotations

no code implementations22 Oct 2021 Seungbum Hong, Jiwon Lee, Bokyung Park, Ahmed A. Alwusaibie, Anwar H. Alfadhel, Sunghyun Park, Woo Jin Hyung, Min-Kook Choi

For gastrectomy for gastric cancer has more complex twenty-one surgical phases, we generate consensus annotation by the revision process with five specialists.

Surgical phase recognition

Improving Face Recognition with Large Age Gaps by Learning to Distinguish Children

1 code implementation22 Oct 2021 Jungsoo Lee, Jooyeol Yun, Sunghyun Park, Yonggyu Kim, Jaegul Choo

Despite the unprecedented improvement of face recognition, existing face recognition models still show considerably low performances in determining whether a pair of child and adult images belong to the same identity.

Face Recognition

Semi-Autonomous Teleoperation via Learning Non-Prehensile Manipulation Skills

no code implementations27 Sep 2021 Sangbeom Park, Yoonbyung Chai, Sunghyun Park, Jeongeun Park, Kyungjae Lee, Sungjoon Choi

In this paper, we present a semi-autonomous teleoperation framework for a pick-and-place task using an RGB-D sensor.

Learning Slice-Aware Representations with Mixture of Attentions

no code implementations Findings (ACL) 2021 Cheng Wang, Sungjin Lee, Sunghyun Park, Han Li, Young-Bum Kim, Ruhi Sarikaya

Real-world machine learning systems are achieving remarkable performance in terms of coarse-grained metrics like overall accuracy and F-1 score.

Natural Language Understanding

Handling Long-Tail Queries with Slice-Aware Conversational Systems

no code implementations26 Apr 2021 Cheng Wang, Sun Kim, Taiwoo Park, Sajal Choudhary, Sunghyun Park, Young-Bum Kim, Ruhi Sarikaya, Sungjin Lee

We have been witnessing the usefulness of conversational AI systems such as Siri and Alexa, directly impacting our daily lives.

VITON-HD: High-Resolution Virtual Try-On via Misalignment-Aware Normalization

1 code implementation CVPR 2021 Seunghwan Choi, Sunghyun Park, Minsoo Lee, Jaegul Choo

The task of image-based virtual try-on aims to transfer a target clothing item onto the corresponding region of a person, which is commonly tackled by fitting the item to the desired body part and fusing the warped item with the person.

Virtual Try-on Vocal Bursts Intensity Prediction

Neural model robustness for skill routing in large-scale conversational AI systems: A design choice exploration

no code implementations4 Mar 2021 Han Li, Sunghyun Park, Aswarth Dara, Jinseok Nam, Sungjin Lee, Young-Bum Kim, Spyros Matsoukas, Ruhi Sarikaya

Ensuring model robustness or resilience in the skill routing component is an important problem since skills may dynamically change their subscription in the ontology after the skill routing model has been deployed to production.

Automatic Speech Recognition Automatic Speech Recognition (ASR) +3

K-Hairstyle: A Large-scale Korean Hairstyle Dataset for Virtual Hair Editing and Hairstyle Classification

no code implementations11 Feb 2021 Taewoo Kim, Chaeyeon Chung, Sunghyun Park, Gyojung Gu, Keonmin Nam, Wonzo Choe, Jaesung Lee, Jaegul Choo

In response, we introduce a novel large-scale Korean hairstyle dataset, K-hairstyle, containing 500, 000 high-resolution images.

Translation

A scalable framework for learning from implicit user feedback to improve natural language understanding in large-scale conversational AI systems

no code implementations EMNLP 2021 Sunghyun Park, Han Li, Ameen Patel, Sidharth Mudgal, Sungjin Lee, Young-Bum Kim, Spyros Matsoukas, Ruhi Sarikaya

Natural Language Understanding (NLU) is an established component within a conversational AI or digital assistant system, and it is responsible for producing semantic understanding of a user request.

Natural Language Understanding

Vid-ODE: Continuous-Time Video Generation with Neural Ordinary Differential Equation

1 code implementation16 Oct 2020 Sunghyun Park, Kangyeol Kim, Junsoo Lee, Jaegul Choo, Joonseok Lee, Sookyung Kim, Edward Choi

Video generation models often operate under the assumption of fixed frame rates, which leads to suboptimal performance when it comes to handling flexible frame rates (e. g., increasing the frame rate of the more dynamic portion of the video as well as handling missing video frames).

Video Generation

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