Search Results for author: Yusuke Mukuta

Found 33 papers, 7 papers with code

Finding and Generating a Missing Part for Story Completion

1 code implementation COLING (LaTeCHCLfL, CLFL, LaTeCH) 2020 Yusuke Mori, Hiroaki Yamane, Yusuke Mukuta, Tatsuya Harada

We first conduct an experiment focusing on MPP, and our analysis shows that highly accurate predictions can be obtained when the missing part of a story is the beginning or the end.

Position Story Completion

HyperVQ: MLR-based Vector Quantization in Hyperbolic Space

no code implementations18 Mar 2024 Nabarun Goswami, Yusuke Mukuta, Tatsuya Harada

However, since the VQVAE is trained with a reconstruction objective, there is no constraint for the embeddings to be well disentangled, a crucial aspect for using them in discriminative tasks.

Quantization Representation Learning

Symmetric Q-learning: Reducing Skewness of Bellman Error in Online Reinforcement Learning

no code implementations12 Mar 2024 Motoki Omura, Takayuki Osa, Yusuke Mukuta, Tatsuya Harada

In deep reinforcement learning, estimating the value function to evaluate the quality of states and actions is essential.

Continuous Control Q-Learning +1

Fully Spiking Denoising Diffusion Implicit Models

1 code implementation4 Dec 2023 Ryo Watanabe, Yusuke Mukuta, Tatsuya Harada

Spiking neural networks (SNNs) have garnered considerable attention owing to their ability to run on neuromorphic devices with super-high speeds and remarkable energy efficiencies.

Denoising Image Generation

Domain Adaptive Multiple Instance Learning for Instance-level Prediction of Pathological Images

1 code implementation7 Apr 2023 Shusuke Takahama, Yusuke Kurose, Yusuke Mukuta, Hiroyuki Abe, Akihiko Yoshizawa, Tetsuo Ushiku, Masashi Fukayama, Masanobu Kitagawa, Masaru Kitsuregawa, Tatsuya Harada

We conducted experiments on the pathological image dataset we created for this study and showed that the proposed method significantly improves the classification performance compared to existing methods.

Domain Adaptation Multiple Instance Learning

Self-Supervised Learning for Group Equivariant Neural Networks

no code implementations8 Mar 2023 Yusuke Mukuta, Tatsuya Harada

To ensure that training is consistent with the equivariance, we propose two concepts for self-supervised tasks: equivariant pretext labels and invariant contrastive loss.

Self-Supervised Learning

Backprop Induced Feature Weighting for Adversarial Domain Adaptation with Iterative Label Distribution Alignment

1 code implementation WACV 2023 Thomas Westfechtel, Hao-Wei Yeh, Qier Meng, Yusuke Mukuta, Tatsuya Harada

Firstly, it lets the domain classifier focus on features that are important for the classification, and, secondly, it couples the classification and adversarial branch more closely.

Classification Unsupervised Domain Adaptation

Grouped self-attention mechanism for a memory-efficient Transformer

no code implementations2 Oct 2022 Bumjun Jung, Yusuke Mukuta, Tatsuya Harada

Time-series data analysis is important because numerous real-world tasks such as forecasting weather, electricity consumption, and stock market involve predicting data that vary over time.

Time Series Time Series Analysis

Learning from Label Proportions with Instance-wise Consistency

1 code implementation24 Mar 2022 Ryoma Kobayashi, Yusuke Mukuta, Tatsuya Harada

Learning from Label Proportions (LLP) is a weakly supervised learning method that aims to perform instance classification from training data consisting of pairs of bags containing multiple instances and the class label proportions within the bags.

Learning Theory Stochastic Optimization +1

ViNTER: Image Narrative Generation with Emotion-Arc-Aware Transformer

no code implementations15 Feb 2022 Kohei Uehara, Yusuke Mori, Yusuke Mukuta, Tatsuya Harada

Image narrative generation is a task to create a story from an image with a subjective viewpoint.

Time Series Analysis

A Theoretical and Empirical Model of the Generalization Error under Time-Varying Learning Rate

no code implementations29 Sep 2021 Toru Makuuchi, Yusuke Mukuta, Tatsuya Harada

In this study, we analyze the generalization bound for the time-varying case by applying PAC-Bayes and experimentally show that the theoretical functional form for the batch size and learning rate approximates the generalization error well for both cases.

Hyperparameter Optimization

Fully Spiking Variational Autoencoder

1 code implementation26 Sep 2021 Hiromichi Kamata, Yusuke Mukuta, Tatsuya Harada

Spiking neural networks (SNNs) can be run on neuromorphic devices with ultra-high speed and ultra-low energy consumption because of their binary and event-driven nature.

Image Generation Time Series +1

Video Moment Retrieval with Text Query Considering Many-to-Many Correspondence Using Potentially Relevant Pair

no code implementations25 Jun 2021 Sho Maeoki, Yusuke Mukuta, Tatsuya Harada

In this paper, we propose a novel training method that takes advantage of potentially relevant pairs, which are detected based on linguistic analysis about text annotation.

Moment Retrieval Retrieval +1

Neural Star Domain as Primitive Representation

no code implementations NeurIPS 2020 Yuki Kawana, Yusuke Mukuta, Tatsuya Harada

We show that NSD is a universal approximator of the star domain and is not only parsimonious and semantic but also an implicit and explicit shape representation.

Image Reconstruction

Hyperbolic Neural Networks++

1 code implementation ICLR 2021 Ryohei Shimizu, Yusuke Mukuta, Tatsuya Harada

Hyperbolic spaces, which have the capacity to embed tree structures without distortion owing to their exponential volume growth, have recently been applied to machine learning to better capture the hierarchical nature of data.

BIG-bench Machine Learning regression

Rethinking Task and Metrics of Instance Segmentation on 3D Point Clouds

no code implementations27 Sep 2019 Kosuke Arase, Yusuke Mukuta, Tatsuya Harada

Certain existing studies have split input point clouds into small regions such as 1m x 1m; one reason for this is that models in the studies cannot consume a large number of points because of the large space complexity.

Instance Segmentation Semantic Segmentation

Scalable Generative Models for Graphs with Graph Attention Mechanism

no code implementations ICLR 2020 Wataru Kawai, Yusuke Mukuta, Tatsuya Harada

Graphs are ubiquitous real-world data structures, and generative models that approximate distributions over graphs and derive new samples from them have significant importance.

Graph Attention Graph Generation

Compact Approximation for Polynomial of Covariance Feature

no code implementations5 Jun 2019 Yusuke Mukuta, Tatsuaki Machida, Tatsuya Harada

Subsequently, we apply the proposed approximation to the polynomial corresponding to the matrix square root to obtain a compact approximation for the square root of the covariance feature.

Fine-Grained Image Recognition

Invariant Feature Coding using Tensor Product Representation

no code implementations5 Jun 2019 Yusuke Mukuta, Tatsuya Harada

Based on this result, a novel feature model that explicitly consider group action is proposed for principal component analysis and k-means clustering, which are commonly used in most feature coding methods, and global feature functions.

Clustering

Long-Term Human Video Generation of Multiple Futures Using Poses

no code implementations16 Apr 2019 Naoya Fushishita, Antonio Tejero-de-Pablos, Yusuke Mukuta, Tatsuya Harada

First, from an input human video, we generate sequences of future human poses (i. e., the image coordinates of their body-joints) via adversarial learning.

Autonomous Driving Pose Prediction +2

End-to-End Learning Using Cycle Consistency for Image-to-Caption Transformations

no code implementations25 Mar 2019 Keisuke Hagiwara, Yusuke Mukuta, Tatsuya Harada

So far, research to generate captions from images has been carried out from the viewpoint that a caption holds sufficient information for an image.

Weakly supervised collective feature learning from curated media

no code implementations13 Feb 2018 Yusuke Mukuta, Akisato Kimura, David B Adrian, Zoubin Ghahramani

Through these insights, we can define human curated groups as weak labels from which our proposed framework can learn discriminative features as a representation in the space of semantic concepts the users intended when creating the groups.

Link Prediction TAG

DeMIAN: Deep Modality Invariant Adversarial Network

no code implementations23 Dec 2016 Kuniaki Saito, Yusuke Mukuta, Yoshitaka Ushiku, Tatsuya Harada

To obtain the common representations under such a situation, we propose to make the distributions over different modalities similar in the learned representations, namely modality-invariant representations.

Domain Adaptation General Classification +2

Kernel Approximation via Empirical Orthogonal Decomposition for Unsupervised Feature Learning

no code implementations CVPR 2016 Yusuke Mukuta, Tatsuya Harada

Our experiments show that the proposed method is better than the random features method and comparable with the Nystrom method in terms of the approximation error and classification accuracy.

Common Subspace for Model and Similarity: Phrase Learning for Caption Generation From Images

no code implementations ICCV 2015 Yoshitaka Ushiku, Masataka Yamaguchi, Yusuke Mukuta, Tatsuya Harada

In order to overcome the shortage of training samples, CoSMoS obtains a subspace in which (a) all feature vectors associated with the same phrase are mapped as mutually close, (b) classifiers for each phrase are learned, and (c) training samples are shared among co-occurring phrases.

Caption Generation Descriptive

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