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Estimating reflectance and shape of objects from a single cartoon-shaded image

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Computational Visual Media 2017年第1期3卷 21-31页

作者： Hideki Todo Yasushi yamaguchi Tokyo University of Technology The University of Tokyo

Although many photorealistic relighting methods provide a way to change the illumination of objects in a digital photograph, it is currently difficult to relight digital illustrations having a cartoon shading style. The main difference between photorealistic and cartoon shading styles is that cartoon shading is characterized by soft color quantization and nonlinear color variations that cause noticeable reconstruction errors under a physical reflectance assumption, such as Lambertian reflection. To handle this non-photorealistic shading property, we focus on shading analysis of the most fundamental cartoon shading technique. Based on the color map shading representation, we propose a simple method to determine the input shading as that of a smooth shape with a nonlinear reflectance property. We have conducted simple ground-truth evaluations to compare our results to those obtained by other approaches.

关键词： non-photorealistic rendering cartoon shading relighting quantization

pH-controlled hydrothermal synthesis of titanium phosphates and their powder properties

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Journal of Advanced Ceramics 2014年第4期3卷 326-331页

作者： Hiroaki ONODA Taisuke yamaguchi Department of Informatics and Environmental Sciences Kyoto Prefectural University1-5Shimogamo Nakaragi-cyoSakyo-kuKyoto 606-8522Japan

Titanium phosphates were prepared from titanium chloride and sodium pyrophosphate at various pH in hydrothermal process as a novel white pigment for *** chemical composition,powder properties,photo catalytic activity,colour phase and smoothness were *** obtained materials had a higher Ti/P ratio than that used in preparation conditions because of the formation of titanium oxide and *** samples prepared at pH=4 had particles smaller than 100μ*** phosphates had less photo catalytic activity to protect the sebum on the *** obtained materials in hydrothermal process and their thermal products at 100℃showed high reflectance in the range of visible light.

关键词： titanium phosphates pyrophosphate pH photo catalytic activity smoothness

Study on multimers and their structures in molecular association mixture

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Science China Chemistry 2007年第1期50卷 23-31页

作者： yamaguchi Yoshinori OZAKI Yukihiro Consolidated Research Institute for Advanced Science and Medical Care Waseda UniversityJapan Department of Chemistry School of Science and TechnologyKwansei-Gakuin UniversitySandaHyogo 669-1337Japan

Self-association system of(R)-1,3-butanediol in dilute carbon tetrachloride(CCl4)solution is studied as a model of molecular association *** methods including FSMWEFA(fixed-size moving window evolving factor analysis)combined with PCA(principal component analysis),SIMPLISMA (simple-to-use interactive self-modeling mixture analysis),and ITTFA(iterative target transformation factor analysis)are adopted to resolve infrared spectra of(R)-1,3-butanediol *** number and equilibrium constant are computed.(R)-1,3-butanediol in dilute inert solution is determined as a monomer-trimer equilibrium *** investigation of trimer structures is carried out with DFT(density functional theory),and structural factors are analyzed.

关键词： (R)-1 3-butanediol multimer chemometrics density functional theory

Network-Based Predictions and Simulations by Biological State Space Models: Search for Drug Mode of Action

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Journal of Computer Science & Technology 2010年第1期25卷 131-153页

作者： Rui yamaguchi Seiya Imoto Satoru Miyano Human Genome Center Institute of Medical Science University of Tokyo

Since time-course microarrav data are short but contain a large number of genes, most of statistical models should be extended so that they can handle such statistically irregular situations. We introduce biological state space models that are established as suitable computational models for constructing gene networks from microarray gene expression data. This chapter elucidates theory and methodology of our biological state space models together with some representative analyses including discovery of drug mode of action. Through the applications we show the whole strategy of biological state space model analysis involving experimental design of time-course data, model building and analysis of the estimated networks.

关键词： gene networks state space models time-course gene expression data

Microstructure and Wear Behavior of Cermet/Iron Alloy Cladding Layers on A6061 Alloy Coated by Resistance Seam Welding Method

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Acta Metallurgica Sinica(English Letters) 2015年第4期28卷 414-423页

作者： Wen-Qin Wang Tomiko yamaguchi Kazumasa Nishio Faculty of Engineering Kyushu Institute of Technology Nishinippon Institute of Technology

Cermet/iron alloy cladding layers were coated on the surface of Al-Mg-Si alloy （A6061） plates by resistance seam welding method with tungsten carbide （WC） and high-carbon iron alloy （SHA） powders. The cladding layer consisted of WC reinforcement, SHA binder, A6061 and FeAl3. The effect of WC ratio （30 wt%, 50 wt% and 70 wt%） on the microstructure and wear behavior of the cladding layers was investigated in detail. Abrasive wear test was performed under two kinds of load condition by using a rubber wheel apparatus to evaluate wear resistance. The results showed that the wear resistance of the cladding layer was improved by 3.5-5 times than that of the substrate. At lower load, the wear resistances of the samples 30% and 70% WC were nearly the same, which suggested that FeAl3 played an important role in improvement of the wear resistance instead of WC. While at higher load, the amount of WC determined the wear resistance of the cladding layer. Furthermore, wear behavior of these cladding layers was explained with reference to the observed microstructure of the worn surface.

关键词： Resistance seam welding A6061 WC Cladding layer Wear resistance

Hybrid image of three contents

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Visual Computing for Industry,Biomedicine,and Art 2020年第1期3卷 31-38页

作者： Peeraya Sripian Yasushi yamaguchi SIT Research Laboratory Shibaura Institute of TechnologyRoom#04R313-7-5 ToyosuKoto-kuTokyo 135-8548Japan The University of Tokyo Bldg.#15Room#505A3-8-1KomabaMeguro-kuTokyo 153-8902Japan

A hybrid image allows multiple image interpretations to be modulated by the viewing ***,it can be constructed by combining the low and high spatial frequencies of two different *** original hybrid image synthesis was limited to similar shapes of source images that were aligned in the edges,e.g.,faces with a different expression,to produce an effective double image *** our previous work,we proposed a noiseinserted method for synthesizing a hybrid image from dissimilar shape images or unaligned *** this work,we propose a novel method for adding an image to be seen from a middle viewing *** middlefrequency(MF)image is extracted by a special bandpass filter,which generates ringing while extracting only specified frequency *** this method,the middle frequency should be perceived as a meaningless pattern when viewed from a far distance and close up.A parameter tuning experiment was performed to determine the suitable cutoff frequencies for designing the filter for the MF *** found that ringings of a suitable size could be used to make the middle frequency less noticeable when seen from far away.

关键词： Hybrid image Contrast sensitivity Frequency filtering Scale-space

Effects of Aspect Ratio in a Transonic Shock Tube Airfoil Flow

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Journal of Thermal Science 2012年第5期21卷 435-440页

作者： Masashi KASHITANI Keita MIURA Shinichiro NAKAO Yutaka yamaguchi Department of Aerospace Engineering National Defense Academy1-10-20 Hashirimizu Yokosuka 239-8686 JAPAN Department of Mechanical Engineering Nagasaki Institute of Applied Science 536 Aba-MachiNagasaki 851-0193 JAPAN

In the present study, the flow visualizations were performed around the NACA 0012 models which differ in aspect ratios. We discussed the effects of the aspect ratio in the test models. Additionally the unsteady, two-dimensional, compressible Euler equations were solved for the NACA 0012 airfoil. Experiments were performed utilizing the conventional gas driven shock tube as the intermittent transonic wind tunnel. The aspect ratios of the models are about 0.86 and 1.5, respectively. The Mach numbers M 2 are about 0.84. The Reynolds numbers of the present experimental conditions were constant that Re based on chord length is about 4.0×10 5 . The results are as follows: in different aspect ratios, the difference of the shock wave location is confirmed though the Mach number and Reynolds number are same. It indicates the different correction Mach number by the effects of the side wall boundary layer though the nominal Mach number measured the same value. Also, on the difference of shock wave location for the effects of the aspect ratio, the tend of CFD shows the qualitative agreement with the result of an experiment.

关键词： Shock tube Aerodynamics Transonic flows Aspect ratio Wind tunnel correction

Model predictive control for hybrid vehicle ecological driving using traffic signal and road slope information

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Control Theory and Technology 2015年第1期13卷 17-28页

作者： Kaijiang YU Junqi YANG Daisuke yamaguchi School of Electrical Engineering and Automation Henan Polytechnic University School of Information Science and Electrical Engineering Kyushu University

This paper presents development of a control system for ecological driving of a hybrid vehicle. Prediction using traffic signal and road slope information is considered to improve the fuel economy. It is assumed that the automobile receives traffic signal information from intelligent transportation systems （ITS）. Model predictive control is used to calculate optimal vehicle control inputs using traffic signal and road slope information. The performance of the proposed method was analyzed through computer simulation results. Both the fuel economy and the driving profile are optimized using the proposed approach. It was observed that fuel economy was improved compared with driving of a typical human driving model.

关键词： Ecological driving model predictive control intelligent transportation systems traffic signal optimal control

The Influence of a Posture on the Autonomic Nervous System and Stress Hormones in Saliva

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Health 2020年第2期12卷 118-126页

作者： yusuke Goto Ailing Hu Takuji yamaguchi Nobuhiro Suetake Hiroyuki Kobayashi Department of Hospital Administration Juntendo University Graduate School of Medicine Tokyo Japan Center for Advanced Kampo Medicine and Clinical Research Juntendo University Graduate School of Medicine Tokyo Japan

Humans and animals give several impressions to their recipients with their postures. In this study, the influence of postures on a body was examined through the perspective of the endocrine system and the autonomic nervous system. The subjects were 18 healthy adults (7 males and 11 females). A slouching posture like arching back was defined as a low power pose (LP), and a posture straightening back and throwing out chest is defined as a high power pose (HP). Starting at rest, the subjects took LP posture and changed to HP posture, and their autonomic nervous functions were measured and their saliva was collected before and after taking each posture. In taking LP posture, the decrease of the parasympathetic nervous activity, the increase of the pathetic nervous activity and the increase of chromogranin A in saliva were observed. The increase of the autonomic nervous activity, and the decrease of chromogranin A which had been increased by taking LP posture were observed by taking HP posture. There was no influence on cortisol by taking either of the postures. This study suggested that bad postures such as curving back affected stress reactions through the perspective of the endocrine system and the automatic nervous system.

关键词： Stress Posture Autonomic Nervous System Saliva Cortisol Chromogranin A