Keita Hirai

Publication Activity (10 Years)

Years Active: 2006-2023
Publications (10 Years): 40

Top Topics

Spectral Reflectance

Top Venues

Material Appearance

Color Imaging: Displaying, Processing, Hardcopy, and Applications

Publications

Isao Kurebayashi, Koshiro Maeda, Nobuyoshi Komuro, Keita Hirai, Hiroo Sekiya, Makoto Ichikawa
Mental-state estimation model with time-series environmental data regarding cognitive function. Internet Things 22 (2023)
Masaya Ohtsu, Akihiro Kurata, Keita Hirai, Midori Tanaka, Takahiko Horiuchi
Evaluating the Influence of ipRGCs on Color Discrimination. J. Imaging 8 (6) (2022)
Kazuki Nagasawa, Shoji Yamamoto, Wataru Arai, Kunio Hakkaku, Chawan Koopipat, Keita Hirai, Norimichi Tsumura
Fabrication of a Human Skin Mockup with a Multilayered Concentration Map of Pigment Components Using a UV Printer. J. Imaging 8 (3) (2022)
Ryogo Miyazaki, Kazuya Sasaki, Norimichi Tsumura, Keita Hirai
Hand authentication from RGB-D video based on deep neural network. 3D Imaging and Applications (2022)
Shiori Yamaguchi, Keita Hirai, Takahiko Horiuchi
Video Smoke Removal from a Single Image Sequence. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (6) (2021)
Koshiro Maeda, Isao Kurebayashi, Nobuyoshi Komuro, Keita Hirai
A Study on Time Series Analysis of Environmental Data for Predicting Emotional Conditions. LifeTech (2021)
Masaya Ohtsu, Akihiro Kurata, Keita Hirai
Color Discrimination Experiments using Metameric ipRGC Stimuli. Color Imaging: Displaying, Processing, Hardcopy, and Applications (2021)
Isao Kurebayashi, Nobuyoshi Komuro, Keita Hirai
Testing Machine Learning Models for Individual Emotion Estimation from Indoor Environment Data. ICCE-TW (2021)
Shoji Tominaga, Keita Hirai, Takahiko Horiuchi
Spectral Estimation of Multiple Light Sources based on Highlight Detection. CIC (2020)
Takumi Nakamura, Yagi Daichi, Kuangzhe Xu, Toshihiko Matsuka, Keita Hirai
Investigating Effects of Visual and Auditory Adaptation on Metallic Material Appearance. CIC (2020)
Kensuke Fukumoto, Kazuki Nagasawa, Wataru Arai, Kunio Hakkaku, Satoshi Kaneko, Keita Hirai, Norimichi Tsumura
Estimation of Layered Ink Layout to reproduce desired Translucency of skin in Inkjet 3D Printer using deep neural network trained with synthetic simulated data. CIC (2020)
Kazuki Iwata, Hiroki Shirasawa, Keita Hirai
Image-Based Measurement of Structural Color using Spectral Camera. CIC (2020)
Naoki Tada, Keita Hirai
BTF Image Recovery based on U-Net and Texture Interpolation. Material Appearance (2020)
Koushirou Maeda, Keita Hirai, Takahiko Horiuchi
Haze Transfer Between Images Based on Dark Channel Prior. CCIW (2019)
Junki Yoshii, Shoji Yamamoto, Kazuki Nagasawa, Wataru Arai, Satoshi Kaneko, Keita Hirai, Norimichi Tsumura
Estimation of Layered Ink Layout from Arbitrary Skin Color and Translucency in Inkjet 3D Printer. CIC (2019)
Maulisa Oktiana, Khairun Saddami, Fitri Arnia, Yuwaldi Away, Keita Hirai, Takahiko Horiuchi, Khairul Munadi
Advances in Cross-Spectral Iris Recognition Using Integrated Gradientface-Based Normalization. IEEE Access 7 (2019)
Tomoyuki Takanashi, Keita Hirai, Takahiko Horiuchi
Construction of facial emotion database through subjective experiments and its application to deep learning-based facial image processing. Image Processing: Algorithms and Systems (2019)
Hiroki Shirasawa, Keita Hirai, Takahiko Horiuchi
Makeup Skin Appearance Reproduction by Spectral Projection Mapping. CCIW (2019)
Shoji Tominaga, Keita Hirai, Takahiko Horiuchi
Appearance Reconstruction of Fluorescent Objects Based on Reference Geometric Factors. CIC (2019)
Takumi Nakamura, Keita Hirai, Takahiko Horiuchi
Constructing glossiness perception model of computer graphics with sounds. Material Appearance (2019)
Shoji Tominaga, Keita Hirai, Takahiko Horiuchi
Appearance Reconstruction of Mutual Illumination Effect between Plane and Curved Fluorescent Objects. Material Appearance (2019)
Keita Hirai, Naoto Osawa, Motoki Hori, Takahiko Horiuchi, Shoji Tominaga
High-Dynamic-Range Spectral Imaging System for Omnidirectional Scene Capture. J. Imaging 4 (4) (2018)
Takahiko Horiuchi, Xu Wen, Keita Hirai
Reversible Color-to-Gray Mapping with Resistance to JPEG Encoding. SSIAI (2018)
Shoji Tominaga, Keita Hirai, Takahiko Horiuchi
A General Method for Estimating Fluorescent Donaldson Matrices. Material Appearance (2018)
Shiori Yamaguchi, Keita Hirai, Takahiko Horiuchi
Video Smoke Removal Based on Smoke Imaging Model and Space-Time Pixel Compensation. CCIW (2017)
Takafumi Katsunuma, Keita Hirai, Takahiko Horiuchi
Fabric Appearance Control System for Example-Based Interactive Texture and Color Design. ACM Trans. Appl. Percept. 14 (3) (2017)
Takahiko Horiuchi, Yuma Saito, Keita Hirai
Analysis of Material Representation of Manga Line Drawings using Convolutional Neural Networks. CIC (2017)
Shoji Tominaga, Keiji Kato, Keita Hirai, Takahiko Horiuchi
Appearance Reconstruction of Fluorescent Objects for Different Materials and Light Source. CIC (2017)
Shoji Tominaga, Keiji Kato, Keita Hirai, Takahiko Horiuchi
Appearance Decomposition and Reconstruction of Textured Fluorescent Objects. Material Appearance (2017)
Keita Hirai, Wataru Suzuki, Yoshimitsu Yamada, Takahiko Horiuchi
Interactive Object Surface Retexturing using Perceptual Quality Indexes. Material Appearance (2017)
Yoshimitsu Yamada, Keita Hirai, Takahiko Horiuchi
Correlation Analysis between Wood Eigen Textures and Perceptual Qualities. CIC (2017)
Shoji Tominaga, Shingo Dozaki, Yukiko Kuma, Keita Hirai, Takahiko Horiuchi
Modeling and Estimation for Surface-Spectral Reflectance of Watercolor Paintings. Measuring, Modeling, and Reproducing Material Appearance (2016)
Shoji Tominaga, Keiji Kato, Keita Hirai, Takahiko Horiuchi
Spectral Image Analysis of Florescent Objects with Mutual Illumination. CIC (2016)
Keita Hirai, Ryosuke Nakahata, Takahiko Horiuchi
Measuring Spectral Reflectance and 3D Shape Using Multi-primary Image Projector. ICISP (2016)
Takafumi Katsunuma, Keita Hirai, Takahiko Horiuchi
Perceptual Dependencies in Fabric Appearance between Texture and Color. Measuring, Modeling, and Reproducing Material Appearance (2016)
Keita Hirai, Daisuke Irie, Takahiko Horiuchi
Photometric and geometric measurements based on multi-primary image projector. CVCS (2015)
Yuma Saito, Keita Hirai, Takahiko Horiuchi
Construction of Manga Materials Database for Analyzing Perception of Materials in Line Drawings. CIC (2015)
Ryosuke Nakahata, Keita Hirai, Takahiko Horiuchi, Shoji Tominaga
Development of a Dynamic Relighting System for Moving Planar Objects with Unknown Reflectance. CCIW (2015)
Takahiko Horiuchi, Jiqiang Lin, Keita Hirai
Visual Quality Improvement of Color-Embedded Gray Images for a Reversible Color-to-Gray Algorithm. AECIA (2015)
Shoji Tominaga, Keiji Kato, Keita Hirai, Takahiko Horiuchi
Bispectral Interreflection Estimation of Fluorescent Objects. CIC (2015)
Shoji Tominaga, Daiki Watanabe, Keita Hirai, Takahiko Horiuchi
Spectral analysis of omnidirectional color signals in natural scenes. Color Imaging: Displaying, Processing, Hardcopy, and Applications (2014)
Jiqiang Lin, Takahiko Horiuchi, Keita Hirai, Shoji Tominaga
Color image recovery system from printed gray image. SSIAI (2014)
Shoji Tominaga, Keita Hirai, Takahiko Horiuchi
Measurement and Modeling of Bidirectional Characteristics of Fluorescent Objects. ICISP (2014)
Keita Hirai, Naoto Osawa, Takahiko Horiuchi, Shoji Tominaga
An HDR Spectral Imaging System for Time-Varying Omnidirectional Scene. ICPR (2014)
Yuxing Wu, Keita Hirai, Takahiko Horiuchi
Investigation of Japanese Onomatopoeias as Features for SHITSUKAN-Based Image Retrieval. ISM (2013)
Keita Hirai, Tetsushi Tanimoto, Kazuya Yamamoto, Takahiko Horiuchi, Shoji Tominaga
An LED-Based Spectral Imaging System for Surface Reflectance and Normal Estimation. SITIS (2013)
Shoji Tominaga, Hideki Kadoi, Keita Hirai, Takahiko Horiuchi
Metal-dielectric object classification by combining polarization property and surface spectral reflectance. Color Imaging: Displaying, Processing, Hardcopy, and Applications (2013)
Shoji Tominaga, Keita Hirai, Takahiko Horiuchi
Estimation of bispectral matrix for fluorescent objects. CVCS (2013)
Nguyen Thuc Dieu Hang, Takahiko Horiuchi, Keita Hirai, Shoji Tominaga
Estimation of Two Illuminant Spectral Power Distributions from Highlights of Overlapping Illuminants. SITIS (2013)
Keita Hirai, Shoji Tominaga
A LUT-based Method for Recovering Color Signals from High Dynamic Range Images. Color Imaging Conference (2012)
Keita Hirai, Shoji Tominaga
Color Signal Estimation in High Dynamic Range Scenes. Color Imaging Conference (2011)
Takuya Iwanami, Ayano Kikuchi, Keita Hirai, Toshiya Nakaguchi, Norimichi Tsumura, Yoichi Miyake
Psychological Effects of Ambient Illumination Control and Illumination Layout While Viewing Various Video Images. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (2) (2011)
Keita Hirai, Toshiaki Mikami, Norimichi Tsumura, Toshiya Nakaguchi
Measurement and Modeling of Chromatic Spatio-Velocity Contrast Sensitivity Function and its Application to Video Quality Evaluation. Color Imaging Conference (2010)
Keita Hirai, Jambal Tumurtogoo, Ayano Kikuchi, Norimichi Tsumura, Toshiya Nakaguchi, Yoichi Miyake
Video Quality Assessment Using Spatio-Velocity Contrast Sensitivity Function. IEICE Trans. Inf. Syst. (5) (2010)
Sayuri Kamimigaki, Shoji Yamamoto, Keita Hirai, Norimichi Tsumura, Toshiya Nakaguchi, Yoichi Miyake
Real reproducing of 3D appearance with multi-projectors and cameras. Color Imaging Conference (2009)
Ayano Kikuchi, Keita Hirai, Toshiya Nakaguchi, Norimichi Tsumura, Yoichi Miyake
Adaptive Ambient Illumination Based on Color Harmony Model. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (12) (2009)
Takuya Iwanami, Ayano Kikuchi, Takashi Kaneko, Keita Hirai, Natsumi Yano, Toshiya Nakaguchi, Norimichi Tsumura, Yasuhiro Yoshida, Yoichi Miyake
The relationship between ambient illumination and psychological factors in viewing of display Images. Color Imaging: Displaying, Processing, Hardcopy, and Applications (2009)
Keita Hirai, Jambal Tumurtogoo, Ayano Kikuchi, Toshiya Nakaguchi, Norimichi Tsumura, Yoichi Miyake
SV-CIELAB: Video Quality Assessment using Spatio-Velocity Contrast Sensitivity Function. Color Imaging Conference (2009)
Sayuri Kamimigaki, Keisuke Taki, Keita Hirai, Shoji Yamamoto, Norimichi Tsumura, Toshiya Nakaguchi, Yoichi Miyake
Compensation for projected image under dim illumination with CIECAM02. CGIV/MCS (2008)
Keita Hirai, Norimichi Tsumura, Toshiya Nakaguchi, Yoichi Miyake
Measurement and Modeling of Viewing-Condition-Dependent Spatio-Velocity Contrast Sensitivity Function. Color Imaging Conference (2007)
Keita Hirai, Toshiya Nakaguchi, Norimichi Tsumura, Yoichi Miyake
Photometric HDR video for visual adaptation models. SIGGRAPH Research Posters (2006)