Search Results for author: Jin Young Choi

Found 40 papers, 22 papers with code

MoST: Motion Style Transformer between Diverse Action Contents

1 code implementation10 Mar 2024 Boeun Kim, Jungho Kim, Hyung Jin Chang, Jin Young Choi

While existing motion style transfer methods are effective between two motions with identical content, their performance significantly diminishes when transferring style between motions with different contents.

Disentanglement Motion Style Transfer +1

UFO: Unidentified Foreground Object Detection in 3D Point Cloud

no code implementations8 Jan 2024 Hyunjun Choi, Hawook Jeong, Jin Young Choi

The evaluation includes a new approach to measure the performance on our goal, i. e. both localization and OOD detection of UFOs.

Autonomous Driving Object +3

Gaussian Mixture Proposals with Pull-Push Learning Scheme to Capture Diverse Events for Weakly Supervised Temporal Video Grounding

1 code implementation27 Dec 2023 Sunoh Kim, Jungchan Cho, Joonsang Yu, Youngjoon Yoo, Jin Young Choi

In the weakly supervised temporal video grounding study, previous methods use predetermined single Gaussian proposals which lack the ability to express diverse events described by the sentence query.

Sentence Temporal Sentence Grounding +2

Three Factors to Improve Out-of-Distribution Detection

no code implementations2 Aug 2023 Hyunjun Choi, JaeHo Chung, Hawook Jeong, Jin Young Choi

In the problem of out-of-distribution (OOD) detection, the usage of auxiliary data as outlier data for fine-tuning has demonstrated encouraging performance.

Contrastive Learning Out-of-Distribution Detection +2

Balanced Energy Regularization Loss for Out-of-distribution Detection

1 code implementation CVPR 2023 Hyunjun Choi, Hawook Jeong, Jin Young Choi

Our balanced energy regularization loss utilizes class-wise different prior probabilities for auxiliary data to address the class imbalance in OOD data.

Classification Out-of-Distribution Detection +2

Confidence-Based Feature Imputation for Graphs with Partially Known Features

1 code implementation26 May 2023 Daeho Um, Jiwoong Park, Seulki Park, Jin Young Choi

To overcome this limitation, we introduce a novel concept of channel-wise confidence in a node feature, which is assigned to each imputed channel feature of a node for reflecting certainty of the imputation.

Graph Learning Imputation +2

Audio Bank: A High-Level Acoustic Signal Representation for Audio Event Recognition

no code implementations11 Apr 2023 Tushar Sandhan, Sukanya Sonowal, Jin Young Choi

Automatic audio event recognition plays a pivotal role in making human robot interaction more closer and has a wide applicability in industrial automation, control and surveillance systems.

Quantitative Manipulation of Custom Attributes on 3D-Aware Image Synthesis

no code implementations CVPR 2023 Hoseok Do, EunKyung Yoo, Taehyeong Kim, Chul Lee, Jin Young Choi

While 3D-based GAN techniques have been successfully applied to render photo-realistic 3D images with a variety of attributes while preserving view consistency, there has been little research on how to fine-control 3D images without limiting to a specific category of objects of their properties.

3D-Aware Image Synthesis Attribute +1

Font Representation Learning via Paired-glyph Matching

1 code implementation20 Nov 2022 Junho Cho, Kyuewang Lee, Jin Young Choi

For the discriminative representation of a font from others, we propose a paired-glyph matching-based font representation learning model that attracts the representations of glyphs in the same font to one another, but pushes away those of other fonts.

Font Style Transfer Representation Learning +2

Meta-node: A Concise Approach to Effectively Learn Complex Relationships in Heterogeneous Graphs

no code implementations26 Oct 2022 Jiwoong Park, Jisu Jeong, KyungMin Kim, Jin Young Choi

To tackle this challenge, we propose a novel concept of meta-node for message passing that can learn enriched relational knowledge from complex heterogeneous graphs without any meta-paths and meta-graphs by explicitly modeling the relations among the same type of nodes.

Contrastive Learning Graph Learning +1

Global-local Motion Transformer for Unsupervised Skeleton-based Action Learning

1 code implementation13 Jul 2022 Boeun Kim, Hyung Jin Chang, Jungho Kim, Jin Young Choi

To tackle the learning of whole-body motion, long-range temporal dynamics, and person-to-person interactions, we design a global and local attention mechanism, where, global body motions and local joint motions pay attention to each other.

Position-aware Location Regression Network for Temporal Video Grounding

no code implementations12 Apr 2022 Sunoh Kim, Kimin Yun, Jin Young Choi

The key to successful grounding for video surveillance is to understand a semantic phrase corresponding to important actors and objects.

Position regression +1

Pose-MUM : Reinforcing Key Points Relationship for Semi-Supervised Human Pose Estimation

no code implementations15 Mar 2022 Jongmok Kim, Hwijun Lee, Jaeseung Lim, Jongkeun Na, Nojun Kwak, Jin Young Choi

A well-designed strong-weak augmentation strategy and the stable teacher to generate reliable pseudo labels are essential in the teacher-student framework of semi-supervised learning (SSL).

Pose Estimation Semi-Supervised Human Pose Estimation

Hypergraph-Induced Semantic Tuplet Loss for Deep Metric Learning

1 code implementation CVPR 2022 Jongin Lim, Sangdoo Yun, Seulki Park, Jin Young Choi

In this paper, we propose Hypergraph-Induced Semantic Tuplet (HIST) loss for deep metric learning that leverages the multilateral semantic relations of multiple samples to multiple classes via hypergraph modeling.

Metric Learning Node Classification

Influential Rank: A New Perspective of Post-training for Robust Model against Noisy Labels

no code implementations14 Jun 2021 Seulki Park, Hwanjun Song, Daeho Um, Dae Ung Jo, Sangdoo Yun, Jin Young Choi

Deep neural network can easily overfit to even noisy labels due to its high capacity, which degrades the generalization performance of a model.

Learning with noisy labels

Unsupervised Hyperbolic Representation Learning via Message Passing Auto-Encoders

1 code implementation CVPR 2021 Jiwoong Park, Junho Cho, Hyung Jin Chang, Jin Young Choi

Most of the existing literature regarding hyperbolic embedding concentrate upon supervised learning, whereas the use of unsupervised hyperbolic embedding is less well explored.

Representation Learning

An ensemble of Density based Geometric One-Class Classifier and Genetic Algorithm

no code implementations2 Oct 2020 Do Gyun Kim, Jin Young Choi

However, existing H-RTGL based OCC classifiers have limitations that (i) most of them cannot reflect density of target class and (ii) that considering density has primitive interval generation method, and (iii) there exists no systematic procedure for hyperparameter of H-RTGL based OCC classifier, which influences classification performance of classifier.

Classification General Classification +3

Class-Attentive Diffusion Network for Semi-Supervised Classification

1 code implementation18 Jun 2020 Jongin Lim, Daeho Um, Hyung Jin Chang, Dae Ung Jo, Jin Young Choi

In contrast to the existing diffusion methods with a transition matrix determined solely by the graph structure, CAD considers both the node features and the graph structure with the design of our class-attentive transition matrix that utilizes a classifier.

Classification General Classification

Differentiable Forward and Backward Fixed-Point Iteration Layers

no code implementations7 Feb 2020 Younghan Jeon, Minsik Lee, Jin Young Choi

FPI\_NN is intuitive, simple, and fast to train, while FPI_GD can be used for efficient training of energy networks that have been recently studied.

Image Denoising Multi-Label Classification +1

Variational Autoencoded Regression: High Dimensional Regression of Visual Data on Complex Manifold

no code implementations CVPR 2017 YoungJoon Yoo, Sangdoo Yun, Hyung Jin Chang, Yiannis Demiris, Jin Young Choi

(iii) The proposed regression is embedded into a generative model, and the whole procedure is developed by the variational autoencoder framework.

regression

Symmetric Graph Convolutional Autoencoder for Unsupervised Graph Representation Learning

1 code implementation ICCV 2019 Jiwoong Park, Minsik Lee, Hyung Jin Chang, Kyuewang Lee, Jin Young Choi

For the reconstruction of node features, the decoder is designed based on Laplacian sharpening as the counterpart of Laplacian smoothing of the encoder, which allows utilizing the graph structure in the whole processes of the proposed autoencoder architecture.

Clustering Graph Clustering +3

Cross-modal Variational Auto-encoder with Distributed Latent Spaces and Associators

no code implementations30 May 2019 Dae Ung Jo, ByeongJu Lee, Jongwon Choi, Haanju Yoo, Jin Young Choi

We formulate the cross-modal association in Bayesian inference framework realized by a deep neural network with multiple variational auto-encoders and variational associators.

Bayesian Inference

Neuro-Optimization: Learning Objective Functions Using Neural Networks

no code implementations24 May 2019 Younghan Jeon, Minsik Lee, Jin Young Choi

With a carefully-designed objective function, mathematical optimization can be quite helpful in solving many problems.

Optical Flow Estimation

A Comprehensive Overhaul of Feature Distillation

2 code implementations ICCV 2019 Byeongho Heo, Jeesoo Kim, Sangdoo Yun, Hyojin Park, Nojun Kwak, Jin Young Choi

We investigate the design aspects of feature distillation methods achieving network compression and propose a novel feature distillation method in which the distillation loss is designed to make a synergy among various aspects: teacher transform, student transform, distillation feature position and distance function.

General Classification Image Classification +5

Skeleton-based Action Recognition of People Handling Objects

no code implementations21 Jan 2019 Sunoh Kim, Kimin Yun, Jongyoul Park, Jin Young Choi

In this paper, to address this problem, we propose a new framework for recognizing object-related human actions by graph convolutional networks using human and object poses.

Action Recognition Object +3

Backbone Can Not be Trained at Once: Rolling Back to Pre-trained Network for Person Re-Identification

1 code implementation18 Jan 2019 Youngmin Ro, Jongwon Choi, Dae Ung Jo, Byeongho Heo, Jongin Lim, Jin Young Choi

Our strategy alleviates the problem of gradient vanishing in low-level layers and robustly trains the low-level layers to fit the ReID dataset, thereby increasing the performance of ReID tasks.

Person Re-Identification Pose Estimation

Knowledge Transfer via Distillation of Activation Boundaries Formed by Hidden Neurons

2 code implementations8 Nov 2018 Byeongho Heo, Minsik Lee, Sangdoo Yun, Jin Young Choi

In this paper, we propose a knowledge transfer method via distillation of activation boundaries formed by hidden neurons.

Transfer Learning

Knowledge Distillation with Adversarial Samples Supporting Decision Boundary

1 code implementation15 May 2018 Byeongho Heo, Minsik Lee, Sangdoo Yun, Jin Young Choi

In this paper, we provide a new perspective based on a decision boundary, which is one of the most important component of a classifier.

Adversarial Attack Knowledge Distillation

Context-aware Deep Feature Compression for High-speed Visual Tracking

1 code implementation CVPR 2018 Jongwon Choi, Hyung Jin Chang, Tobias Fischer, Sangdoo Yun, Kyuewang Lee, Jiyeoup Jeong, Yiannis Demiris, Jin Young Choi

We propose a new context-aware correlation filter based tracking framework to achieve both high computational speed and state-of-the-art performance among real-time trackers.

Denoising Feature Compression +3

Simultaneous Detection and Removal of High Altitude Clouds From an Image

no code implementations ICCV 2017 Tushar Sandhan, Jin Young Choi

Interestingly, shape of the high-altitude clouds serves as a beacon for weather forecasting, so its detection is of vital importance.

Vocal Bursts Intensity Prediction Weather Forecasting

Palettenet: Image recolorization with given color palette

1 code implementation The IEEE Conference on Computer Vision and Pattern Recognition (CVPR) Workshops 2017 Junho Cho, Sangdoo Yun, Kyoung Mu Lee, Jin Young Choi

PaletteNet is then designed to change the color concept of a source image so that the palette of the output image is close to the target palette.

Anti-Glare: Tightly Constrained Optimization for Eyeglass Reflection Removal

no code implementations CVPR 2017 Tushar Sandhan, Jin Young Choi

Absence of a clear eye visibility not only degrades the aesthetic value of an entire face image but also creates difficulties in many computer vision tasks.

Reflection Removal

Action-Decision Networks for Visual Tracking With Deep Reinforcement Learning

1 code implementation CVPR 2017 Sangdoo Yun, Jongwon Choi, Youngjoon Yoo, Kimin Yun, Jin Young Choi

In contrast to the existing trackers using deep networks, the proposed tracker is designed to achieve a light computation as well as satisfactory tracking accuracy in both location and scale.

reinforcement-learning Reinforcement Learning (RL) +1

Visual Tracking Using Attention-Modulated Disintegration and Integration

no code implementations CVPR 2016 Jongwon Choi, Hyung Jin Chang, Jiyeoup Jeong, Yiannis Demiris, Jin Young Choi

In this paper, we present a novel attention-modulated visual tracking algorithm that decomposes an object into multiple cognitive units, and trains multiple elementary trackers in order to modulate the distribution of attention according to various feature and kernel types.

Object Visual Tracking

Visual Path Prediction in Complex Scenes With Crowded Moving Objects

no code implementations CVPR 2016 YoungJoon Yoo, Kimin Yun, Sangdoo Yun, JongHee Hong, Hawook Jeong, Jin Young Choi

In this paper, we consider moving dynamics of co-occurring objects for path prediction in a scene that includes crowded moving objects.

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