Search Results for author: Masayuki Tanaka

Found 28 papers, 4 papers with code

Two-Step Color-Polarization Demosaicking Network

no code implementations13 Sep 2022 Vy Nguyen, Masayuki Tanaka, Yusuke Monno, Masatoshi Okutomi

Polarization information of light in a scene is valuable for various image processing and computer vision tasks.

Demosaicking Vocal Bursts Valence Prediction

PoF: Post-Training of Feature Extractor for Improving Generalization

1 code implementation5 Jul 2022 Ikuro Sato, Ryota Yamada, Masayuki Tanaka, Nakamasa Inoue, Rei Kawakami

We developed a training algorithm called PoF: Post-Training of Feature Extractor that updates the feature extractor part of an already-trained deep model to search a flatter minimum.

Multi-Modal Pedestrian Detection with Large Misalignment Based on Modal-Wise Regression and Multi-Modal IoU

no code implementations23 Jul 2021 Napat Wanchaitanawong, Masayuki Tanaka, Takashi Shibata, Masatoshi Okutomi

Due to this assumption's breakdown, the position of the bounding boxes does not match between the two modalities, resulting in a significant decrease in detection accuracy, especially in regions where the amount of misalignment is large.

Pedestrian Detection regression

Geometric Data Augmentation Based on Feature Map Ensemble

no code implementations22 Jul 2021 Takashi Shibata, Masayuki Tanaka, Masatoshi Okutomi

The performance of CNN is dramatically degraded by geometric transformation, such as large rotations.

Data Augmentation

Hyper Suprime-Cam Legacy Archive

no code implementations14 Jan 2021 Masayuki Tanaka, Hiroyuki Ikeda, Kazumi Murata, Satoshi Takita, Sogo Mineo, Michitaro Koike, Yuki Okura, Sumiko Harasawa

HSC is an optical wide-field imager installed at the prime focus of the Subaru Telescope and has been in operation since 2014.

Instrumentation and Methods for Astrophysics Astrophysics of Galaxies

Deep Snapshot HDR Imaging Using Multi-Exposure Color Filter Array

no code implementations20 Nov 2020 Takeru Suda, Masayuki Tanaka, Yusuke Monno, Masatoshi Okutomi

In this paper, we propose a deep snapshot high dynamic range (HDR) imaging framework that can effectively reconstruct an HDR image from the RAW data captured using a multi-exposure color filter array (ME-CFA), which consists of a mosaic pattern of RGB filters with different exposure levels.

Image Reconstruction

Adaptive Future Frame Prediction with Ensemble Network

no code implementations13 Nov 2020 Wonjik Kim, Masayuki Tanaka, Masatoshi Okutomi, Yoko SASAKI

A common limitation of the existing learning-based approaches is a mismatch of training data and test data.

Human Segmentation with Dynamic LiDAR Data

1 code implementation16 Oct 2020 Tao Zhong, Wonjik Kim, Masayuki Tanaka, Masatoshi Okutomi

It has a two-branch structure, i. e., the spatial segmentation branch and the temporal velocity estimation branch.

Segmentation

Monochrome and Color Polarization Demosaicking Using Edge-Aware Residual Interpolation

no code implementations28 Jul 2020 Miki Morimatsu, Yusuke Monno, Masayuki Tanaka, Masatoshi Okutomi

Since the polarimeter consists of an image sensor equipped with a monochrome or color polarization filter array (MPFA or CPFA), the demosaicking process to interpolate missing pixel values plays a crucial role in obtaining high-quality polarization images.

Demosaicking

Unsupervised Learning of Image Segmentation Based on Differentiable Feature Clustering

2 code implementations20 Jul 2020 Wonjik Kim, Asako Kanezaki, Masayuki Tanaka

The usage of convolutional neural networks (CNNs) for unsupervised image segmentation was investigated in this study.

Clustering Image Segmentation +3

Classifying degraded images over various levels of degradation

no code implementations15 Jun 2020 Kazuki Endo, Masayuki Tanaka, Masatoshi Okutomi

Classification for degraded images having various levels of degradation is very important in practical applications.

Classification Ensemble Learning +1

Learning-Based Human Segmentation and Velocity Estimation Using Automatic Labeled LiDAR Sequence for Training

no code implementations11 Mar 2020 Wonjik Kim, Masayuki Tanaka, Masatoshi Okutomi, Yoko SASAKI

In this paper, we propose an automatic labeled sequential data generation pipeline for human segmentation and velocity estimation with point clouds.

Segmentation

Block-wise Scrambled Image Recognition Using Adaptation Network

no code implementations21 Jan 2020 Koki Madono, Masayuki Tanaka, Masaki Onishi, Tetsuji Ogawa

In this study, a perceptually hidden object-recognition method is investigated to generate secure images recognizable by humans but not machines.

Image Classification Object +1

New Perspective of Interpretability of Deep Neural Networks

no code implementations12 Sep 2019 Masanari Kimura, Masayuki Tanaka

Improving the interpretability of DNNs is one of the hot research topics.

Breaking Inter-Layer Co-Adaptation by Classifier Anonymization

no code implementations4 Jun 2019 Ikuro Sato, Kohta Ishikawa, Guoqing Liu, Masayuki Tanaka

This study addresses an issue of co-adaptation between a feature extractor and a classifier in a neural network.

Interpretation of Feature Space using Multi-Channel Attentional Sub-Networks

no code implementations30 Apr 2019 Masanari Kimura, Masayuki Tanaka

To tackle this problem, we exploit a multi-channel attention mechanism in feature space.

Attribute

Improving Transparency of Deep Neural Inference Process

no code implementations13 Mar 2019 Hiroshi Kuwajima, Masayuki Tanaka, Masatoshi Okutomi

However, the inference process of deep learning is black-box, and not very suitable to safety-critical systems which must exhibit high transparency.

Weighted Sigmoid Gate Unit for an Activation Function of Deep Neural Network

no code implementations3 Oct 2018 Masayuki Tanaka

In this paper, a weighted sigmoid gate unit (WiG) is proposed as the activation function.

Image Restoration Object +1

Gradient-Based Low-Light Image Enhancement

no code implementations25 Sep 2018 Masayuki Tanaka, Takashi Shibata, Masatoshi Okutomi

A low-light image enhancement is a highly demanded image processing technique, especially for consumer digital cameras and cameras on mobile phones.

Low-Light Image Enhancement

Non-blind Image Restoration Based on Convolutional Neural Network

no code implementations11 Sep 2018 Kazutaka Uchida, Masayuki Tanaka, Masatoshi Okutomi

Blind image restoration processors based on convolutional neural network (CNN) are intensively researched because of their high performance.

Image Restoration

Learnable Image Encryption

no code implementations19 Mar 2018 Masayuki Tanaka

This scheme allows us to train the network without the privacy issues.

BIG-bench Machine Learning

Network Analysis for Explanation

no code implementations7 Dec 2017 Hiroshi Kuwajima, Masayuki Tanaka

Safety critical systems strongly require the quality aspects of artificial intelligence including explainability.

Misalignment-Robust Joint Filter for Cross-Modal Image Pairs

no code implementations ICCV 2017 Takashi Shibata, Masayuki Tanaka, Masatoshi Okutomi

Next, the joint-filter cost volume and a set of filtered images are computed from the target image and the set of the translated guidances.

Photometric Redshifts for Hyper Suprime-Cam Subaru Strategic Program Data Release 1

no code implementations20 Apr 2017 Masayuki Tanaka, Jean Coupon, Bau-Ching Hsieh, Sogo Mineo, Atsushi J. Nishizawa, Joshua Speagle, Hisanori Furusawa, Satoshi Miyazaki, Hitoshi Murayama

Photometric redshifts are a key component of many science objectives in the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP).

Astrophysics of Galaxies

Gradient-Domain Image Reconstruction Framework With Intensity-Range and Base-Structure Constraints

no code implementations CVPR 2016 Takashi Shibata, Masayuki Tanaka, Masatoshi Okutomi

To generate detail-preserving and artifact-free output images, we combine the benefits of the two approaches into the proposed framework by introducing the intensity-range constraint and the base-structure constraint.

Image Reconstruction Image Restoration +1

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