Search Results for author: Shohei Nobuhara

Found 16 papers, 2 papers with code

Dynamic 3D Gaze From Afar: Deep Gaze Estimation From Temporal Eye-Head-Body Coordination

no code implementations CVPR 2022 Soma Nonaka, Shohei Nobuhara, Ko Nishino

We introduce a novel method and dataset for 3D gaze estimation of a freely moving person from a distance, typically in surveillance views.

Gaze Estimation

View Birdification in the Crowd: Ground-Plane Localization from Perceived Movements

no code implementations9 Nov 2021 Mai Nishimura, Shohei Nobuhara, Ko Nishino

We introduce view birdification, the problem of recovering ground-plane movements of people in a crowd from an ego-centric video captured from an observer (e. g., a person or a vehicle) also moving in the crowd.

Shape From Sky: Polarimetric Normal Recovery Under the Sky

no code implementations CVPR 2021 Tomoki Ichikawa, Matthew Purri, Ryo Kawahara, Shohei Nobuhara, Kristin Dana, Ko Nishino

That is, we show that the unique polarization pattern encoded in the polarimetric appearance of an object captured under the sky can be decoded to reveal the surface normal at each pixel.

Polarimetric Normal Stereo

no code implementations CVPR 2021 Yoshiki Fukao, Ryo Kawahara, Shohei Nobuhara, Ko Nishino

Our key idea is to introduce a polarimetric cost volume of distance defined on the polarimetric observations and the polarization state computed from the surface normal.


Structure of Multiple Mirror System from Kaleidoscopic Projections of Single 3D Point

no code implementations29 Mar 2021 Kosuke Takahashi, Shohei Nobuhara

The kaleidoscopic imaging system can be recognized as the virtual multi-camera system and has strong advantages in that the virtual cameras are strictly synchronized and have the same intrinsic parameters.

Video Region Annotation with Sparse Bounding Boxes

no code implementations17 Aug 2020 Yuzheng Xu, Yang Wu, Nur Sabrina binti Zuraimi, Shohei Nobuhara, Ko Nishino

Video analysis has been moving towards more detailed interpretation (e. g. segmentation) with encouraging progresses.

Invertible Neural BRDF for Object Inverse Rendering

1 code implementation ECCV 2020 Zhe Chen, Shohei Nobuhara, Ko Nishino

We introduce a novel neural network-based BRDF model and a Bayesian framework for object inverse rendering, i. e., joint estimation of reflectance and natural illumination from a single image of an object of known geometry.

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.

3D-GMNet: Single-View 3D Shape Recovery as A Gaussian Mixture

no code implementations10 Dec 2019 Kohei Yamashita, Shohei Nobuhara, Ko Nishino

In this paper, we introduce 3D-GMNet, a deep neural network for 3D object shape reconstruction from a single image.

3D Reconstruction Density Estimation +1

Appearance and Shape from Water Reflection

no code implementations25 Jun 2019 Ryo Kawahara, Meng-Yu Jennifer Kuo, Shohei Nobuhara, Ko Nishino

In other words, for the first time, we show that capturing a direct and water-reflected scene in a single exposure forms a self-calibrating HDR catadioptric stereo camera.

3D Scene Reconstruction Stereo Matching +1

Deep Photovoltaic Nowcasting

no code implementations15 Oct 2018 Jinsong Zhang, Rodrigo Verschae, Shohei Nobuhara, Jean-François Lalonde

Our experiments reveal that the MLP network, already used similarly in previous work, achieves an RMSE skill score of 7% over the commonly-used persistence baseline on the 1-minute future photovoltaic power prediction task.

A Linear Extrinsic Calibration of Kaleidoscopic Imaging System from Single 3D Point

no code implementations CVPR 2017 Kosuke Takahashi, Akihiro Miyata, Shohei Nobuhara, Takashi Matsuyama

This paper proposes a new extrinsic calibration of kaleidoscopic imaging system by estimating normals and distances of the mirrors.

Panoptic Studio: A Massively Multiview System for Social Interaction Capture

1 code implementation9 Dec 2016 Hanbyul Joo, Tomas Simon, Xulong Li, Hao liu, Lei Tan, Lin Gui, Sean Banerjee, Timothy Godisart, Bart Nabbe, Iain Matthews, Takeo Kanade, Shohei Nobuhara, Yaser Sheikh

The core challenges in capturing social interactions are: (1) occlusion is functional and frequent; (2) subtle motion needs to be measured over a space large enough to host a social group; (3) human appearance and configuration variation is immense; and (4) attaching markers to the body may prime the nature of interactions.

A Linear Generalized Camera Calibration From Three Intersecting Reference Planes

no code implementations ICCV 2015 Mai Nishimura, Shohei Nobuhara, Takashi Matsuyama, Shinya Shimizu, Kensaku Fujii

This paper presents a new generalized (or ray-pixel, raxel) camera calibration algorithm for camera systems involving distortions by unknown refraction and reflection processes.

Camera Calibration

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