-Opt Neural Approaches to Quadratic Assignment Problems. - Shin Ishii; Hirotaka Niitsuma (Neural Comput., 2000)

Analog lambda-opt approach to quadratic assignment problem. - Hirotaka Niitsuma; Shin Ishii; Minoru Ito (Syst. Comput. Jpn., 2000)

Spiral Mining Using Attributes from 3D Molecular Structures. - Takashi Okada; Masumi Yamakawa; Hirotaka Niitsuma (Active Mining, 2003)

A Trainable Object-Detection Method Using Equivalent Retinotopical Sampling and Fisher Kernel. - Hirotaka Niitsuma (KES, 2003)

A Non-Parametric Trainable Object-Detection Model Using A Concept Of Retinotopic Sampling. - Hirotaka Niitsuma (Int. J. Comput. Intell. Appl., 2004)

Covariance and PCA for Categorical Variables. - Hirotaka Niitsuma; Takashi Okada (PAKDD, 2005)

Bayesian Network Based Reparameterization of Haar-like Feature. - Hirotaka Niitsuma (AAAI, 2006)

Biologically motivated vergence control system using human-like selective attention model. - Sang-Bok Choi; Bum-Soo Jung; Sang-Woo Ban; Hirotaka Niitsuma; Minho Lee 001 (Neurocomputing, 2006)

Triangulation from Two Views Revisited: Hartley-Sturm vs. Optimal Correction. - Kenichi Kanatani; Yasuyuki Sugaya; Hirotaka Niitsuma (BMVC, 2008)

Hyper Least Squares and Its Applications. - Prasanna Rangarajan; Kenichi Kanatani; Hirotaka Niitsuma; Yasuyuki Sugaya (ICPR, 2010)

Optimization without Minimization Search: Constraint Satisfaction by Orthogonal Projection with Applications to Multiview Triangulation. - Kenichi Kanatani; Yasuyuki Sugaya; Hirotaka Niitsuma (IEICE Trans. Inf. Syst., 2010)

Optimal Computation of 3-D Rotation under Inhomogeneous Anisotropic Noise. - Hirotaka Niitsuma; Kenichi Kanatani (MVA, 2011)

Optimal Two-View Planar Scene Triangulation. - Kenichi Kanatani; Hirotaka Niitsuma (IPSJ Trans. Comput. Vis. Appl., 2011)

HyperLS for Parameter Estimation in Geometric Fitting. - Kenichi Kanatani; Prasanna Rangarajan; Yasuyuki Sugaya; Hirotaka Niitsuma (IPSJ Trans. Comput. Vis. Appl., 2011)

Optimal computation of 3-D similarity: Gauss-Newton vs. Gauss-Helmert. - Kenichi Kanatani; Hirotaka Niitsuma (Comput. Stat. Data Anal., 2012)

Prototype System for Visualizing Review Text Using Evaluative Expression Dictionaries. - Yuki Tanimoto; Hirotaka Niitsuma; Manabu Ohta (APWeb, 2014)

Image processing using miniKanren. - Hirotaka Niitsuma (CoRR, 2014)

Word2Vec is only a special case of Kernel Correspondence Analysis and Kernels for Natural Language Processing. - Hirotaka Niitsuma (CoRR, 2016)

Japanese sentiment analysis using simple alignment sentence classification. - Hirotaka Niitsuma; Daiki Kubota; Manabu Ohta (MEDES, 2018)

Context-Free Grammars Including Left Recursion using Recursive miniKanren. - Hirotaka Niitsuma (Computación y Sistemas, 2018)

Real-Time Gait-Based Age Estimation and Gender Classification from a Single Image. - Chi Xu 003; Yasushi Makihara; Ruochen Liao; Hirotaka Niitsuma; Xiang Li 028; Yasushi Yagi; Jianfeng Lu 003 (WACV, 2021)

Environment Deployment Using Docker over P2P Networks: A Building Process Experimentation. - Hirotaka Niitsuma; Shinji Sugawara (ICCE-Taiwan, 2024)