A megapixel time-gated SPAD image sensor for 2D and 3D imaging applications

K Morimoto, A Ardelean, ML Wu, AC Ulku… - arXiv preprint arXiv …, 2019 - arxiv.org
We present the first 1Mpixel SPAD camera ever reported. The camera features 3.8 ns time
gating and 24kfps frame rate; it was fabricated in 180nm CIS technology. Two pixels have …

A dual-mode 303-megaframes-per-second charge-domain time-compressive computational CMOS image sensor

K Kagawa, M Horio, AN Pham, T Ibrahim, S Okihara… - Sensors, 2022 - mdpi.com
An ultra-high-speed computational CMOS image sensor with a burst frame rate of 303
megaframes per second, which is the fastest among the solid-state image sensors, to our …

Time-of-flight imaging in fog using multiple time-gated exposures

D Kijima, T Kushida, H Kitajima, K Tanaka, H Kubo… - Optics …, 2021 - opg.optica.org
We propose a time-of-flight measurement algorithm for depth and intensity that is robust to
fog. The key idea of the algorithm is to compensate for the scattering effects of fog by using …

Thermal non-line-of-sight imaging from specular and diffuse reflections

M Kaga, T Kushida, T Takatani, K Tanaka… - IPSJ Transactions on …, 2019 - Springer
This paper presents a non-line-of-sight technique to estimate the position and temperature
of an occluded object from a camera via reflection on a wall. Because objects with heat emit …

Resolving multi-path interference in compressive time-of-flight depth imaging with a multi-tap macro-pixel computational CMOS image sensor

M Horio, Y Feng, T Kokado, T Takasawa, K Yasutomi… - Sensors, 2022 - mdpi.com
Multi-path interference causes depth errors in indirect time-of-flight (ToF) cameras. In this
paper, resolving multi-path interference caused by surface reflections using a multi-tap …

Material classification from time-of-flight distortions

K Tanaka, Y Mukaigawa, T Funatomi… - IEEE transactions on …, 2018 - ieeexplore.ieee.org
This paper presents a material classification method using an off-the-shelf Time-of-Flight
(ToF) camera. The proposed method is built upon a key observation that the depth …

Depth from phasor distortions in fog

T Muraji, K Tanaka, T Funatomi, Y Mukaigawa - Optics express, 2019 - opg.optica.org
This paper presents a time-of-flight (ToF) measurement method for use in foggy weather.
The depth measured by a ToF camera is greatly distorted in fog because the light scattered …

Time-resolved far infrared light transport decomposition for thermal photometric stereo

K Tanaka, N Ikeya, T Takatani, H Kubo… - … on Pattern Analysis …, 2019 - ieeexplore.ieee.org
We present a novel time-resolved light transport decomposition method using thermal
imaging. Because the speed of heat propagation is much slower than the speed of light …

Far Infrared Light Transport Decomposition and Its Application for Thermal Photometric Stereo

K TANAKA - … for Scene Understanding: Transient, Spectral, and …, 2024 - books.google.com
Light transport is a study of the complex interaction between light and matter. Decomposing
light transport powers low-level computer vision tasks that range from shape recovery to …

Separation of multi-path components in sweep-less time-of-flight depth imaging with a temporally-compressive multi-aperture image sensor

F Mochizuki, K Kagawa, R Miyagi, MW Seo… - ITE Transactions on …, 2018 - jstage.jst.go.jp
This paper demonstrates to separate multi-path components caused by specular reflection
with temporally compressive time-of-flight (CToF) depth imaging. Because a multi-aperture …