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Shin'ya Yamaguchi

12 accepted papers

2026

Lossless Vocabulary Reduction for Auto-Regressive Language Models

ICLR 2026poster

Tokenization---the process of decomposing a given text into a sequence of subwords called tokens---is one of the key components in the development of language models. Particularly, auto-regressive language models generate texts token by token, i.e., by predicting the next-token distribution given th…

Cited by 0SourceScholar
2025

Post-pre-training for Modality Alignment in Vision-Language Foundation Models

CVPR 2025poster

Contrastive language image pre-training (CLIP) is an essential component of building modern vision-language foundation models. While CLIP demonstrates remarkable zero-shot performance on downstream tasks, the multi-modal feature spaces still suffer from a modality gap, which is a gap between image a…

2025

Test-time Adaptation for Regression by Subspace Alignment

ICLR 2025poster

This paper investigates test-time adaptation (TTA) for regression, where a regression model pre-trained in a source domain is adapted to an unknown target distribution with unlabeled target data. Although regression is one of the fundamental tasks in machine learning, most of the existing TTA method…

2024

Adaptive Random Feature Regularization on Fine-tuning Deep Neural Networks

CVPR 2024poster

While fine-tuning is a de facto standard method for training deep neural networks it still suffers from overfitting when using small target datasets. Previous methods improve fine-tuning performance by maintaining knowledge of the source datasets or introducing regularization terms such as contrasti…

Cited by 1SourcePDFScholar
2023

Adversarial Finetuning with Latent Representation Constraint to Mitigate Accuracy-Robustness Tradeoff

ICCV 2023poster

This paper addresses the tradeoff between standard accuracy on clean examples and robustness against adversarial examples in deep neural networks (DNNs). Although adversarial training (AT) improves robustness, it degrades the standard accuracy, thus yielding the tradeoff. To mitigate this tradeoff…

Cited by 7PDFScholar
2023

One-vs-the-Rest Loss to Focus on Important Samples in Adversarial Training

ICML 2023poster

This paper proposes a new loss function for adversarial training. Since adversarial training has difficulties, e.g., necessity of high model capacity, focusing on important data points by weighting cross-entropy loss has attracted much attention. However, they are vulnerable to sophisticated attacks…

Cited by 12SourcePDFScholar
2023

Regularizing Neural Networks with Meta-Learning Generative Models

NeurIPS 2023poster

This paper investigates methods for improving generative data augmentation for deep learning. Generative data augmentation leverages the synthetic samples produced by generative models as an additional dataset for classification with small dataset settings. A key challenge of generative data augment…

Cited by 4SourcePDFScholar
2022

Meta-ticket: Finding optimal subnetworks for few-shot learning within randomly initialized neural networks

NeurIPS 2022accept

Few-shot learning for neural networks (NNs) is an important problem that aims to train NNs with a few data. The main challenge is how to avoid overfitting since over-parameterized NNs can easily overfit to such small dataset. Previous work (e.g. MAML by Finn et al. 2017) tackles this challenge by me…

2021

Pruning Randomly Initialized Neural Networks with Iterative Randomization

NeurIPS 2021spotlight

Pruning the weights of randomly initialized neural networks plays an important role in the context of lottery ticket hypothesis. Ramanujan et al. (2020) empirically showed that only pruning the weights can achieve remarkable performance instead of optimizing the weight values. However, to achieve th…