Search Results for author: Ryosuke Nakamura

Found 16 papers, 5 papers with code

Attention-Guided Lidar Segmentation and Odometry Using Image-to-Point Cloud Saliency Transfer

no code implementations28 Aug 2023 Guanqun Ding, Nevrez Imamoglu, Ali Caglayan, Masahiro Murakawa, Ryosuke Nakamura

To address these challenges, we propose a saliency-guided approach that leverages attention information to improve the performance of LiDAR odometry estimation and semantic segmentation models.

3D Semantic Segmentation Autonomous Driving +2

Surgical Skill Assessment via Video Semantic Aggregation

no code implementations4 Aug 2022 Zhenqiang Li, Lin Gu, Weimin WANG, Ryosuke Nakamura, Yoichi Sato

Automated video-based assessment of surgical skills is a promising task in assisting young surgical trainees, especially in poor-resource areas.

Representation Learning

Exploring Object-Aware Attention Guided Frame Association for RGB-D SLAM

no code implementations28 Jan 2022 Ali Caglayan, Nevrez Imamoglu, Oguzhan Guclu, Ali Osman Serhatoglu, Weimin WANG, Ahmet Burak Can, Ryosuke Nakamura

This can be very useful for visual tasks such as simultaneous localization and mapping (SLAM) where CNN representations of spatially attentive object locations may lead to improved performance.

Object Simultaneous Localization and Mapping

When CNNs Meet Random RNNs: Towards Multi-Level Analysis for RGB-D Object and Scene Recognition

1 code implementation26 Apr 2020 Ali Caglayan, Nevrez Imamoglu, Ahmet Burak Can, Ryosuke Nakamura

The second stage maps these features into high level representations with a fully randomized structure of recursive neural networks (RNNs) efficiently.

Object Recognition Scene Recognition

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.

Salient object detection on hyperspectral images using features learned from unsupervised segmentation task

1 code implementation28 Feb 2019 Nevrez Imamoglu, Guanqun Ding, Yuming Fang, Asako Kanezaki, Toru Kouyama, Ryosuke Nakamura

Various saliency detection algorithms from color images have been proposed to mimic eye fixation or attentive object detection response of human observers for the same scenes.

Clustering Image Segmentation +7

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

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.

Hyperspectral Image Dataset for Benchmarking on Salient Object Detection

2 code implementations29 Jun 2018 Nevrez Imamoglu, Yu Oishi, Xiaoqiang Zhang, Guanqun Ding, Yuming Fang, Toru Kouyama, Ryosuke Nakamura

Many works have been done on salient object detection using supervised or unsupervised approaches on colour images.

Benchmarking Object +4

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

Object Detection of Satellite Images Using Multi-Channel Higher-order Local Autocorrelation

no code implementations28 Jul 2017 Kazuki Uehara, Hidenori Sakanashi, Hirokazu Nosato, Masahiro Murakawa, Hiroki Miyamoto, Ryosuke Nakamura

The Earth observation satellites have been monitoring the earth's surface for a long time, and the images taken by the satellites contain large amounts of valuable data.

Earth Observation Object +2

Solar Power Plant Detection on Multi-Spectral Satellite Imagery using Weakly-Supervised CNN with Feedback Features and m-PCNN Fusion

1 code implementation21 Apr 2017 Nevrez Imamoglu, Motoki Kimura, Hiroki Miyamoto, Aito Fujita, Ryosuke Nakamura

To express the strength of the top-down connections, we introduce feedback CNN network (FB-Net) to a baseline CNN model used for solar power plant classification on multi-spectral satellite data.

General Classification Image Classification

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