JaLCDOI 10.18926/19680 山田 充| 大崎 紘一| We reason the circumstances around the three-dimensional vertex from the information about the intersection point in the two-dimensional image data inputted from a camera on the premise that we use this method as the eye ot the robot. In this method, we use the Vertex-Dictionary. We make the Vertex-Dictionary by calculation from CAD data of object figure (these data are already known) and the position data of the point of view. This dictionary includes the data of position and relations of connect surface etc. about a vertex. We get the data of three-dimensional vertex by comparison the data of two-dimensional intersection point in image data and Vertex-Dictionary. And we get the three-dimensional object by reasoning about the information of circumstances of all vertexes. Then we can recognize the three-dimensional object from image data. In this report, we explain the process to calculate the Vertex-Dictionary and some examples about this method. Memoirs of the Faculty of Engineering, Okayama University 1999-04-27 33巻 2号 85 89 0475-0071 English publisher
JaLCDOI 10.18926/19689 Tokunaga Shuichi| 大崎 紘一| This paper deals with analytical method of human motion by image processing to make a model of the scooping process, Firstly, the scooping tool is the spoon, and while the scooping process is performing, the movement of the mouth center position and the spoon top position are measured by two cameras. As the amount of substance is over the uppermost area of the cup, the spoon is stuck obliquely into substance. Then the spoon is rotated and lifted up to the mouth. Secondly, we recognize the mouth center from the characteristic of the face image data and calculate the spoon top position to extract two points on the spoon handle from the time series images by two cameras. Finally, we describe the method of recognizing the coordinate of the mouth center and estimating the coordinate of the spoon top to analyse the scooping process. Memoirs of the Faculty of Engineering, Okayama University 1999-04-27 33巻 2号 105 110 0475-0071 English publisher
JaLCDOI 10.18926/14136 内田 哲也| 石丸 早苗| 島村 薫| 宇治 章人| 松尾 俊彦| 大月 洋| PE film was treated with fuming nitric acid at 80℃ for 20 min, resulting in introduction of COOH moieties on the film surface. The COOH’s were reacted with ethylenediamine, whose amino groups were used for linking with (2-[4-(dibutylamino)phenyl]ethenyl)-3-carboxy-methylbenzo-thiazolium, photoelectric dye (NK-5962), which absorbs visible light and converts the photon energy to electric potentials. The dye molecules were immobilized on the PE film surface and they were able to stimulate chick retinal tissues on incidence of visible light. These facts hopefully lead to development of an artificial retinal prosthesis. Memoirs of the Faculty of Engineering, Okayama University 2005-01 39巻 1号 16 20 0475-0071 English publisher
JaLCDOI 10.18926/19955 金谷 健一| Sugaya Yasuyuki| A new numerical scheme is presented for computing strict maximum likelihood (ML) of geometric fitting problems having an implicit constraint. Our approach is orthogonal projection of observations onto a parameterized surface defined by the constraint. Assuming a linearly separable nonlinear constraint, we show that a theoretically global solution can be obtained by iterative Sampson error minimization. Our approach is illustrated by ellipse fitting and fundamental matrix computation. Our method also encompasses optimal correction, computing, e.g., perpendiculars to an ellipse and triangulating stereo images. A detailed discussion is given to technical and practical issues about our approach. Memoirs of the Faculty of Engineering, Okayama University 2010-01 44巻 13 23 1349-6115 English publisher
JaLCDOI 10.18926/19956 金谷 健一| Sugaya Yasuyuki| We present an improved version of the MSL method of Sugaya and Kanatani for multibody motion segmentation. We replace their initial segmentation based on heuristic clustering by an analytical computation based on GPCA, fitting two 2-D affine spaces in 3-D by the Taubin method. This initial segmentation alone can segment most of the motions in natural scenes fairly correctly, and the result is successively optimized by the EM algorithm in 3-D, 5-D, and 7-D. Using simulated and real videos, we demonstrate that our method outperforms the previous MSL and other existing methods. We also illustrate its mechanism by our visualization technique. Memoirs of the Faculty of Engineering, Okayama University 2010-01 44巻 24 31 1349-6115 English publisher
JaLCDOI 10.18926/19958 金谷 健一| Rangrajan Prasanna| This paper presents a new method for fitting an ellipse to a point sequence extracted from images. It is widely known that the best fit is obtained by maximum likelihood. However, it requires iterations, which may not converge in the presence of large noise. Our approach is algebraic distance minimization; no iterations are required. Exploiting the fact that the solution depends on the way the scale is normalized, we analyze the accuracy to high order error terms with the scale normalization weight unspecified and determine it so that the bias is zero up to the second order. We demonstrate by experiments that our method is superior to the Taubin method, also algebraic and known to be highly accurate. Memoirs of the Faculty of Engineering, Okayama University 2010-01 44巻 42 49 1349-6115 English publisher
JaLCDOI 10.18926/20012 東辻 千枝子| Matsubara, Takeo| Obuchi, Masumi| A molecular orbital approach to the electronic structure of C(60) molecule is formulated on the basis of optimized bond orbital model and the stability of the truncated icosahedron structure is examined. Memoirs of the Faculty of Engineering, Okayama University 1994-11-30 29巻 1号 15 22 0475-0071 English publisher
JaLCDOI 10.18926/15350 島村 薫| Munesawa Yuhji| 内田 哲也| Poly (ethylene-block-vinyl alcohol), which consisted of both hydrophobic and hydrophilic blocks, was prepared by using polyethylene single crystals as starting material. Polyethylene single crystals reacted with fuming nitric acid resulting in long methylene chains with functional groups such as COOH and NO(2) at the ends (the chain length were almost same as the lamellar thickness of polyethylene single crystal). The functionalized methylene chains were allowed to react with 4-aminostyrene to give corresponding amides, i.e., methylene chains with vinyl groups at the ends (macromer). The macromers were extended by block-copolymerization with vinyl acetate, then saponified resulting in PE/PVA block co-polymer. The block copolymer was molded into sheets which were subsequently heat-treated in contact with hydrophilic or hydrophobic media. Depending on the media, the sheet surface changed at high temperature reversibly from hydrophilic to hydrophobic and vice versa. The surface property was fixed by quenching because both blocks were able to crystallize. Thus the surface of this material can be tailored for various purposes at high temperature, and then used in stable at room temperature. Memoirs of the Faculty of Engineering, Okayama University 2001-03-27 35巻 1-2号 29 34 0475-0071 English publisher
JaLCDOI 10.18926/15352 島村 薫| 内田 哲也| 井上 智博| Rigid polymer, poly(p-phenylene benzobisthiazole), formed lamellar crystals where the molecular chains were oriented perpendicular to the lamellae. It was supposed that, because of wide distribution in the chain length, the lamellar surface bristled with the chain cilia among which many voids were included. Crystallographically, this region afforded us a transitional structure from full to deficient packings of chains. The structure was analyzed using the scanning probe microscope. In the course the method for imaging one molecular chain end was developed. From the images it was concluded that an isolated long cilius did not move so violently at room temperature. Memoirs of the Faculty of Engineering, Okayama University 2001-03-27 35巻 1-2号 35 40 0475-0071 English publisher
JaLCDOI 10.18926/19622 島村 薫| Zhang Chunxiao| 内田 哲也| Rigid polymer poly(p-phenylene benzobisthiazole) was crystallized from dilute solution. Electron microscopy showed that upon quenching, flat fibrils with several nm thick were produced. Subsequent heat treatment in solvent changed the fibril into "shish-kebab". On the other hand, by isothermal crystallization, an aggregate of parallel rod-like crystals was obtained. The molecular chains were accommodated normal to the rod. Based on the observation of crystal morphology, the isothermal crystallization mechanism was proposed. Because of regidity of polymer chains and wide distribution of the molecular length, the chain ends were inevitably included within the crystals resulting in crystal defects such as axial shift, lattice curvature and edge dislocation which were directly observed by lattice imaging. Memoirs of the Faculty of Engineering, Okayama University 1996-12-27 31巻 1号 5 10 0475-0071 English publisher
JaLCDOI 10.18926/19624 Zhang Chunxiao| Tanigawa Satoshi| 内田 哲也| 島村 薫| Poly[(benzo[1,2-d:5,4-d']bissthiazole-2,6-diyl)-1,4-phenylene](cis-PBZT)with a relatively high molecular weight was prepared by a new synthesis route. Properties of the synthesized polymer, such as thermostability, liquid crystallinity etc. were investigated and compared with those of trans-PBZT. cis-PBZT was crystallized from dilute solution and the electron microscopy showed that the precipitate was a rod-like crystal similar to that of trans form. In spite of rigid nature of the back bone, cis-PBZT showed poor crystallinity. Memoirs of the Faculty of Engineering, Okayama University 1996-12-27 31巻 1号 11 17 0475-0071 English publisher
JaLCDOI 10.18926/14088 Tarequl Islam Bhuiyan| 中西 真| 藤井 達生| 高田 潤| Co-precipitation method has been employed to fabricate neodymium substituted hematite with different compositions from the aqueous solution of their corresponding metal salts. Thermal analysis and X-ray diffraction studies revealed the coexistence of Fe(2)O(3) and Nd(2)O(3) phases up to 1050℃ and formation of solid solution phase among them at 1100℃ and above temperatures, which was evidenced by shifting of the XRD peaks. Unit cell parameters and the cell volumes of the samples were found to increase by adding Nd(3+) ions in the reaction process. FESEM studies showed the suppression of particle growth due to the presence of Nd(3+) ions. Spectroscopic measurement evidenced that neodymium substituted hematite exhibited brighter yellowish red color tone than that of pure α-Fe(2)O(3). Memoirs of the Faculty of Engineering, Okayama University 2007-01 41巻 1号 93 98 0475-0071 English publisher
著者 Faculty of Engineering, Okayama University| 2004-03 Memoirs of the Faculty of Engineering, Okayama University 38巻 1-2号 その他
著者 Faculty of Engineering, Okayama University| 2004-03 Memoirs of the Faculty of Engineering, Okayama University 38巻 1-2号 その他
著者 Faculty of Engineering, Okayama University| 2002-11 Memoirs of the Faculty of Engineering, Okayama University 37巻 1号 その他
著者 Faculty of Engineering, Okayama University| 2002-11 Memoirs of the Faculty of Engineering, Okayama University 37巻 1号 その他
著者 Faculty of Engineering, Okayama University| 2003-03 Memoirs of the Faculty of Engineering, Okayama University 37巻 2号 その他
著者 Faculty of Engineering, Okayama University| 2003-03 Memoirs of the Faculty of Engineering, Okayama University 37巻 2号 その他
著者 Faculty of Engineering, Okayama University| 2001-12 Memoirs of the Faculty of Engineering, Okayama University 36巻 1号 その他
著者 Faculty of Engineering, Okayama University| 2001-12 Memoirs of the Faculty of Engineering, Okayama University 36巻 1号 その他