Search Results for author: Kazuki Koga

Found 3 papers, 1 papers with code

Simple black-box universal adversarial attacks on medical image classification based on deep neural networks

no code implementations11 Aug 2021 Kazuki Koga, Kazuhiro Takemoto

In particular, we propose a method for generating UAPs using a simple hill-climbing search based only on DNN outputs and demonstrate the validity of the proposed method using representative DNN-based medical image classifications.

Image Classification Medical Image Classification

Vulnerability of deep neural networks for detecting COVID-19 cases from chest X-ray images to universal adversarial attacks

1 code implementation22 May 2020 Hokuto Hirano, Kazuki Koga, Kazuhiro Takemoto

As an example, we show that iterative fine-tuning of the DNN models using UAPs improves the robustness of the DNN models against UAPs.

COVID-19 Diagnosis

Signal processing approach to mesh refinement in simulations of axisymmetric droplet dynamics

no code implementations20 Sep 2019 Kazuki Koga

We propose a novel mesh refinement scheme based on signal processing for boundary integral simulations of inviscid droplet dynamics with axial symmetry.

Numerical Analysis Numerical Analysis 76B07, 76B45, 65M50

Cannot find the paper you are looking for? You can Submit a new open access paper.