Search Results for author: Ken Sakurada

Found 15 papers, 5 papers with code

Heterogeneous Grid Convolution for Adaptive, Efficient, and Controllable Computation

1 code implementation CVPR 2021 Ryuhei Hamaguchi, Yasutaka Furukawa, Masaki Onishi, Ken Sakurada

This paper proposes a novel heterogeneous grid convolution that builds a graph-based image representation by exploiting heterogeneity in the image content, enabling adaptive, efficient, and controllable computations in a convolutional architecture.

Clustering object-detection +5

Epipolar-Guided Deep Object Matching for Scene Change Detection

no code implementations30 Jul 2020 Kento Doi, Ryuhei Hamaguchi, Shun Iwase, Rio Yokota, Yutaka Matsuo, Ken Sakurada

To cope with the difficulty, we introduce a deep graph matching network that establishes object correspondence between an image pair.

Change Detection Graph Matching +2

Privacy Preserving Visual SLAM

no code implementations ECCV 2020 Mikiya Shibuya, Shinya Sumikura, Ken Sakurada

This study proposes a privacy-preserving Visual SLAM framework for estimating camera poses and performing bundle adjustment with mixed line and point clouds in real time.

Computational Efficiency Privacy Preserving

SOIC: Semantic Online Initialization and Calibration for LiDAR and Camera

no code implementations9 Mar 2020 Weimin Wang, Shohei Nobuhara, Ryosuke Nakamura, Ken Sakurada

This paper presents a novel semantic-based online extrinsic calibration approach, SOIC (so, I see), for Light Detection and Ranging (LiDAR) and camera sensors.

OpenVSLAM: A Versatile Visual SLAM Framework

4 code implementations2 Oct 2019 Shinya Sumikura, Mikiya Shibuya, Ken Sakurada

In this paper, we introduce OpenVSLAM, a visual SLAM framework with high usability and extensibility.

TriDepth: Triangular Patch-based Deep Depth Prediction

no code implementations3 May 2019 Masaya Kaneko, Ken Sakurada, Kiyoharu Aizawa

We propose a novel and efficient representation for single-view depth estimation using Convolutional Neural Networks (CNNs).

3D Scene Reconstruction Depth Estimation +1

Rare Event Detection using Disentangled Representation Learning

no code implementations CVPR 2019 Ryuhei Hamaguchi, Ken Sakurada, Ryosuke Nakamura

The effectiveness of the proposed approach is verified by the quantitative evaluations on four change detection datasets, and the qualitative analysis shows that the proposed method can acquire the representations that disentangle rare events from trivial ones.

Change Detection Event Detection +1

Weakly Supervised Silhouette-based Semantic Scene Change Detection

1 code implementation29 Nov 2018 Ken Sakurada, Mikiya Shibuya, Weimin WANG

A straightforward approach for this task is to train a semantic change detection network directly from a large-scale dataset in an end-to-end manner.

Change Detection Scene Change Detection

Scale Estimation of Monocular SfM for a Multi-modal Stereo Camera

no code implementations28 Oct 2018 Shinya Sumikura, Ken Sakurada, Nobuo Kawaguchi, Ryosuke Nakamura

This paper proposes a novel method of estimating the absolute scale of monocular SfM for a multi-modal stereo camera.

Dense Optical Flow based Change Detection Network Robust to Difference of Camera Viewpoints

no code implementations8 Dec 2017 Ken Sakurada, Weimin WANG, Nobuo Kawaguchi, Ryosuke Nakamura

This paper presents a novel method for detecting scene changes from a pair of images with a difference of camera viewpoints using a dense optical flow based change detection network.

Change Detection Optical Flow Estimation

Filmy Cloud Removal on Satellite Imagery with Multispectral Conditional Generative Adversarial Nets

no code implementations13 Oct 2017 Kenji Enomoto, Ken Sakurada, Weimin WANG, Hiroshi Fukui, Masashi Matsuoka, Ryosuke Nakamura, Nobuo Kawaguchi

The networks are trained to output images that are close to the ground truth using the images synthesized with clouds over the ground truth as inputs.

Cloud Removal

Reflectance Intensity Assisted Automatic and Accurate Extrinsic Calibration of 3D LiDAR and Panoramic Camera Using a Printed Chessboard

1 code implementation18 Aug 2017 Weimin Wang, Ken Sakurada, Nobuo Kawaguchi

Once the corners of the chessboard in the 3D point cloud are estimated, the extrinsic calibration of the two sensors is converted to a 3D-2D matching problem.

Detecting Changes in 3D Structure of a Scene from Multi-view Images Captured by a Vehicle-Mounted Camera

no code implementations CVPR 2013 Ken Sakurada, Takayuki Okatani, Koichiro Deguchi

The proposed method is compared with the methods that use multi-view stereo (MVS) to reconstruct the scene structures of the two time points and then differentiate them to detect changes.

Change Detection

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