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Robust camera pose estimation by viewpoint classification using deep learning

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Computational Visual Media 2017年第2期3卷 189-198页

作者： yoshikatsu Nakajima Hideo Saito Department of Science and Technology Keio UniversityJapan

Camera pose estimation with respect to target scenes is an important technology for superimposing virtual information in augmented reality(AR). However, it is difficult to estimate the camera pose for all possible view angles because feature descriptors such as SIFT are not completely invariant from every perspective. We propose a novel method of robust camera pose estimation using multiple feature descriptor databases generated for each partitioned viewpoint, in which the feature descriptor of each keypoint is almost invariant. Our method estimates the viewpoint class for each input image using deep learning based on a set of training images prepared for each viewpoint class. We give two ways to prepare these images for deep learning and generating databases. In the first method, images are generated using a projection matrix to ensure robust learning in a range of environments with changing *** second method uses real images to learn a given environment around a planar pattern. Our evaluation results confirm that our approach increases the number of correct matches and the accuracy of camera pose estimation compared to the conventional method.

关键词： pose estimation augmented reality(AR) deep learning convolutional neural network

Transporter-Mediated Organ Toxicity

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毒理学杂志 2005年第A3期19卷 173-174页

作者： Hitoshi Endou yoshikatsu Kanai Department of Pharmacology and Toxicology Kyorin University School of Medicine 6-20-2 Shinkawa Mitaka Tokyo 181-8611 Japan Department of Pharmacology and Toxicology Kyorin University School of Medicine 6-20-2 Shinkawa Mitaka Tokyo 181-8611 Japan

The absorption, distribution and excretion of most of xenobiotics, drugs, environmental toxins and their metabolites are mediated by membrane transporters.

关键词：环境毒素调节机构输送机构分子水平

Transporter-Mediated Organ Toxicity

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毒理学杂志 2005年第S1期 173-174页

作者： Hitoshi Endou,yoshikatsu Kanai Department of Pharmacology and Toxicology Kyorin University School of Medicine 6-20-2 Shinkawa Mitaka Tokyo 181-8611 Japan Department of Pharmacology and Toxicology Kyorin University School of Medicine 6-20-2 Shinkawa Mitaka Tokyo 181-8611 Japan

CD98 is a promising prognostic biomarker in biliary tract cancer

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Hepatobiliary & Pancreatic Diseases International 2014年第6期13卷 654-657页

作者： Kyoichi Kaira Yutaka Sunose Noboru Oriuchi yoshikatsu Kanai Izumi Takeyoshi Department of Medicine and Molecular Science Gunma University Graduate School of Medicine Showa-machi Maebashi Gunma Japan Department of Thoracic and Visceral Surgery Gunma University Graduate School of Medicine Showa-machi Maebashi Gunma Japan Department of Diagnostic Radiology and Nuclear Medicine Gunma University Graduate School of Medicine Showa-machi Maebashi Gunma Japan Division of Biosystem Pharmacology Department of Pharmacology Graduate School of Medicine Osaka University Osaka Japan

ABSTRACT： CD98 has been described to play a crucial role in tumor progression and survival. However, the role of CD98 in biliary tract cancer remains unclear. We found that 36.7% of all patients with biliary tract cancer had a high CD98 expression. Statistical analysis using Spearman＇s rank correlation showed that CD98 was significantly correlated with L-type amino acid transporter 1 （LAT1, r=0.562, P〈0.001）, Ki-67 （r=0.230, P=0.006） and CD34 （r=0.290, P=0.005）. Multivariate analysis confirmed that a high CD98 expression was an independent prognostic factor for predicting poor outcome. CD98 is closely associated with tumor growth, biological aggressiveness, and survival of patients. With these data we proposed that CD98 expression is necessary for the development and pathogenesis of biliary tract cancer.

关键词： CD98 biliary tract cancer amino acid transporter prognostic factor

Analysis of ABC (D) stratification for screening patients with gastric cancer

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World Journal of Gastroenterology 2011年第43期17卷 4793-4798页

作者： Tomohiro Kudo Satoru Kakizaki Naondo Sohara Yasuhiro Onozato Shinichi Okamura yoshikatsu Inui Masatomo Mori Department of Medicine and Molecular Science Gunma University Graduate School of MedicineMaebashi Department of Endoscopy and Endoscopic Surgery Shirakawa Clinic Inui Clinic of Internal Medicine

AIM:To evaluate the value of ABC(D) stratification [combination of serum pepsinogen and Helicobacter pylori(***) antibody]of patients with gastric ***:Ninety-five consecutive patients with gastric cancer were enrolled into the *** serum pepsinogenⅠ(PGⅠ) /pepsinogenⅡ(PGⅡ) and *** antibody levels were *** were classified into five groups of ABC(D) stratification according to their serological *** findings of atrophic gastritis and histological differentiation were also analyzed in relation to the ABC(D) ***:The mean patient age was(67.9±8.9) *** patients(3.2%) were classified into group A,7 patients(7.4%) into group A',27 patients(28.4%) into group B,54 patients(56.8%) into group C,and 4patients(4.2%) into group D,*** were only three cases in group A when the patients taking acid proton pump inhibitors and those who had undergone eradication therapy for ***(group A') were *** three cases had mucosal atrophy in the grey zone according to the diagnostic manual of ABC(D) ***,the mean age of the patients with well differentiated adenocarcinoma was significantly higher than that of the patients with poorly differentiated adenocarcinoma(P<0.05) .There were no differences in the pattern of atrophy in the endoscopies between the well differentiated and poorly differentiated ***:ABC(D) stratification is a good method for screening patients with gastric *** is needed for grey zone cases to check the extent of mucosal atrophy.

关键词： Gastric cancer Helicobacter pylori Pepsinogen ABC (D) stratification Cancer screening

Weierstrass’ Elliptic Function Solutions to the Autonomous Limit of the String Equation

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Journal of Applied Mathematics and Physics 2016年第4期4卷 857-862页

作者： yoshikatsu Sasaki Department of Mathematics Hiroshima University Higashi-Hiroshima Japan

In this article, we study the string equation of type (2, 2n + 1), which is derived from 2D gravity theory or the string theory. We consider the equation as a 2n-th order analogue of the first Painlevéequation, take ... 详细信息

关键词： Painlevé Hierarchy String Equation Elliptic Function

The Best Constant of Discrete Sobolev Inequality on a Weighted Truncated Tetrahedron

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World Journal of Engineering and Technology 2015年第3期3卷 149-154页

作者： yoshikatsu Sasaki Department of Mathematics Hiroshima University Higashi-Hiroshima Japan

The best constant of discrete Sobolev inequality on the truncated tetrahedron with a weight which describes 2 kinds of spring constants or bond distances. Main results coincides with the ones of known results by Kametaka et al. under the assumption of uniformity of the spring constants. Since the buckyball fullerene C60 has 2 kinds of edges, destruction of uniformity makes us proceed the application to the chemistry of fullerenes.

关键词： The Best Constant Sobolev Inequality Discrete Laplacian Weighted Graph Truncated Polyhedron

Erratum to “Weierstrass’ Elliptic Function Solution to the Autonomous Limit of the String Equation of Type (2,5)” [Advances in Pure Mathematics 4 (2014), 494-497]

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Advances in Pure Mathematics 2014年第12期4卷 680-681页

作者： yoshikatsu Sasaki Department of Mathematics Hiroshima University Higashi-Hiroshima Japan

In this note, we analyze a few major claims about . As a consequence, we rewrite a major theorem, nullify its proof and one remark of importance, and offer a valid proof for it. The most important gift of this paper is probably the reasoning involved in all: We observe that a constant, namely t, has been changed into a variable, and we then tell why such a move could not have been made, we observe the discrepancy between the claimed domain and the actual domain of a supposed function that is created and we then explain why such a function could not, or should not, have been created, along with others.

关键词： Painlevé Hierarchy String Equation Elliptic Function

Degeneration of the Superintegrable System with Potentials Described by the Sixth PainlevéTranscendents

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Journal of Applied Mathematics and Physics 2014年第11期2卷 996-999页

作者： yoshikatsu Sasaki Department of Mathematics Hiroshima University Higashi-Hiroshima Japan

This article concerns the quantum superintegrable system obtained by Tremblay and Winternitz, which allows the separation of variables in polar coordinates and possesses three conserved quantities with the potential described by the sixth Painlevé equation. The degeneration procedure from the sixth Painlvé equation to the fifth one yields another new superintegrable system;however, the Hermitian nature is broken.

关键词： Superintegrable System Painlevé Equation Degeneration