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360° Depth Estimation from Multiple Fisheye Images with Origami Crown Representation of Icosahedron Bird’s-eye View Image Generation with Camera Malfunction in Irradiation Environment Simultaneous tele-visualization of construction machine and environment using body mounted cameras Visualization of Obstacles on Bird’s-eye ViewUsing Depth Sensor for Remote Controlled Robot Acceptance and Practical Use of Assistive Technologies for Frail Seniors and Caregivers: Interview Surveys on Nursing Homes

Ren Komatsu

Robotics Projects & Research Papers

Ren Komatsu

Robotics Projects & Research Papers

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Publication

360° Depth Estimation from Multiple Fisheye Images with Origami Crown Representation of Icosahedron

In this study, we present a method for all-around depth estimation from multiple omnidirectional images for indoor environments. In particular, we focus on plane-sweeping stereo as the method for depth…

Publication

Bird’s-eye View Image Generation with Camera Malfunction in Irradiation Environment

In this study, a gamma irradiation experiment for our proposed bird's-eye view system was conducted. Experimental results show that cameras attached to our system malfunctioned one by one in the…

Publication

Simultaneous tele-visualization of construction machine and environment using body mounted cameras

During the teleoperation of construction machines, it is highly needed to visualize the machine body itself. This is because the operator needs to perform a visual confirmation of the construction…

Publication

Visualization of Obstacles on Bird’s-eye ViewUsing Depth Sensor for Remote Controlled Robot

Bird's-eye view system is one of image presentation systems for teleoperation. Bird's-eye view image helps an operator to visually recognize surrounding environments because of its high visibility. However, when there…

Publication

Acceptance and Practical Use of Assistive Technologies for Frail Seniors and Caregivers: Interview Surveys on Nursing Homes

Nowadays, with population aging, shortage of care workers is becoming a serious problem in Japan. Therefore, the introduction of assistive technologies at nursing care sites is a measure expected to…

Publication

E-CNN: Accurate Spherical Camera Rotation Estimation via Uniformization of Distorted Optical Flow Fields

Spherical cameras, which can acquire all-round information, are effective to estimate rotation for robotic applications. Recently, Convolutional Neural Networks have shown great robustness in solving such regression problems. However they…

Publication

Cost-effective and Robust Visual Based Localization with Consumer-level Cameras at Construction Sites

Localization is essential for construction machines navigation. Current construction machines use RTK-GNSS for this purpose. We consider that using on-board cameras with SLAM algorithms to estimate machines' ego-motion and position…

Publication

Camera Orientation Estimation in Leaking Indoor Environment via Vanishing Point of Water Drops

In this paper, we propose a novel camera orientation estimation method based on the computation of the vanishing point of water drops in leaking indoor environment. Camera orientation estimation is…

Publication

Gamma-ray Image Noise Generation Using Energy-Image Converter Based on Image Histogram

We propose a novel method to simulate image noise caused by gamma-ray irradiation. Monte Carlo simulation is utilized to calculate the interaction between the gamma-ray and the image sensor, and…

Publication

Visualization of Dump Truck and Excavator in Bird’s-eye View by Fisheye Cameras and 3D Range Sensor

In disaster sites, workers may not be allowed entry due to the risk of secondary disasters. Remote operation of construction machines is then necessary for emergency disaster recovery work. For…

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Research

  • Robotics for Constructions
  • Robotics for Nuclear Application
  • Dense Depth Prediction Using Multiple Fisheye Cameras
  • Free Viewpoint Image Generation for Robot Teleoperation

Selected Papers

  • IROS 2020: 360° Depth Estimation from Multiple Fisheye Images with Origami Crown Representation of Icosahedron
  • ROBOMECH Journal 2020: Free Viewpoint Image Generation System Using Fisheye Cameras and a Laser Rangefinder for Indoor Robot Teleoperation
  • IEEE Access 2019: Octave Deep Plane-sweeping Network: Reducing Spatial Redundancy for Learning-based Plane-sweeping Stereo

Ren Komatsu

Robotics Projects & Research Papers

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