Search Results for author: Tsuyoshi Kato

Found 13 papers, 0 papers with code

Simulation-Aided Deep Learning for Laser Ultrasonic Visualization Testing

no code implementations30 May 2023 Miya Nakajima, Takahiro Saitoh, Tsuyoshi Kato

In recent years, laser ultrasonic visualization testing (LUVT) has attracted much attention because of its ability to efficiently perform non-contact ultrasonic non-destructive testing. Despite many success reports of deep learning based image analysis for widespread areas, attempts to apply deep learning to defect detection in LUVT images face the difficulty of preparing a large dataset of LUVT images that is too expensive to scale.

Data Augmentation Defect Detection +1

A Study on Deep CNN Structures for Defect Detection From Laser Ultrasonic Visualization Testing Images

no code implementations23 May 2023 Miya Nakajima, Takahiro Saitoh, Tsuyoshi Kato

The importance of ultrasonic nondestructive testing has been increasing in recent years, and there are high expectations for the potential of laser ultrasonic visualization testing, which combines laser ultrasonic testing with scattered wave visualization technology.

Defect Detection Object +2

Multi-Target Tobit Models for Completing Water Quality Data

no code implementations21 Feb 2023 Yuya Takada, Tsuyoshi Kato

One drawback of the Tobit model is that only the target variable is allowed to be censored.

Learning Sign-Constrained Support Vector Machines

no code implementations5 Jan 2021 Kenya Tajima, Takahiko Henmi, Kohei Tsuchida, Esmeraldo Ronnie R. Zara, Tsuyoshi Kato

One of the two algorithms is based on the projected gradient method, in which each iteration of the projected gradient method takes $O(nd)$ computational cost and the sublinear convergence of the objective error is guaranteed.

Adaptive Signal Variances: CNN Initialization Through Modern Architectures

no code implementations16 Aug 2020 Takahiko Henmi, Esmeraldo Ronnie Rey Zara, Yoshihiro Hirohashi, Tsuyoshi Kato

In this study, we derived the initialization scheme again not from the simplified Kaiming model, but precisely from the modern CNN architectures, and empirically investigated how the new initialization method performs compared to the de facto standard ones that are widely used today.

Parametric Models for Mutual Kernel Matrix Completion

no code implementations17 Apr 2018 Rachelle Rivero, Tsuyoshi Kato

In view of this limitation, our proposed methods employ the LogDet divergence, which ensures the positive definiteness of the resulting inferred kernel matrix.

Matrix Completion

Threshold Auto-Tuning Metric Learning

no code implementations7 Jan 2018 Yuya Onuma, Rachelle Rivero, Tsuyoshi Kato

In this study, an efficient technique that can solve the nonlinear equation in $O(Mn^{3})$ has been discovered.

Metric Learning

Sign-Constrained Regularized Loss Minimization

no code implementations12 Oct 2017 Tsuyoshi Kato, Misato Kobayashi, Daisuke Sano

In this paper, we introduce sign constraints that are a handy and simple representation for non-experts in generic learning problems.

Mutual Kernel Matrix Completion

no code implementations14 Feb 2017 Tsuyoshi Kato, Rachelle Rivero

In this paper, we present a new method, called Mutual Kernel Matrix Completion (MKMC) algorithm, that tackles this problem of mutually inferring the missing entries of multiple kernel matrices by combining the notions of data fusion and kernel matrix completion, applied on biological data sets to be used for classification task.

Matrix Completion

Stochastic Dykstra Algorithms for Metric Learning on Positive Semi-Definite Cone

no code implementations7 Jan 2016 Tomoki Matsuzawa, Raissa Relator, Jun Sese, Tsuyoshi Kato

Recently, covariance descriptors have received much attention as powerful representations of set of points.

Metric Learning

New Descriptor for Glomerulus Detection in Kidney Microscopy Image

no code implementations19 Jun 2015 Tsuyoshi Kato, Raissa Relator, Hayliang Ngouv, Yoshihiro Hirohashi, Tetsuhiro Kakimoto, Kinya Okada

A new descriptor referred to as Segmental HOG is developed to perform a comprehensive detection of hundreds of glomeruli in images of whole kidney sections.

object-detection Object Detection

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