JaLCDOI 10.18926/19680
フルテキストURL Mem_Fac_Eng_OU_33_2_85.pdf
著者 山田 充| 大崎 紘一|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1999-04-27
33巻
2号
開始ページ 85
終了ページ 89
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002309120
JaLCDOI 10.18926/19689
フルテキストURL Mem_Fac_Eng_OU_33_2_105.pdf
著者 Tokunaga Shuichi| 大崎 紘一|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1999-04-27
33巻
2号
開始ページ 105
終了ページ 110
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002309175
JaLCDOI 10.18926/14136
フルテキストURL Mem_Fac_Eng_39_1_16.pdf
著者 内田 哲也| 石丸 早苗| 島村 薫| 宇治 章人| 松尾 俊彦| 大月 洋|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 16
終了ページ 20
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308066
JaLCDOI 10.18926/19955
フルテキストURL Mem_Fac_Eng_OU_44_13.pdf
著者 金谷 健一| Sugaya Yasuyuki|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2010-01
44巻
開始ページ 13
終了ページ 23
ISSN 1349-6115
言語 English
論文のバージョン publisher
NAID 120002309170
JaLCDOI 10.18926/19956
フルテキストURL Mem_Fac_Eng_OU_44_24.pdf
著者 金谷 健一| Sugaya Yasuyuki|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2010-01
44巻
開始ページ 24
終了ページ 31
ISSN 1349-6115
言語 English
論文のバージョン publisher
NAID 120002309159
JaLCDOI 10.18926/19958
フルテキストURL Mem_Fac_Eng_OU_44_42.pdf
著者 金谷 健一| Rangrajan Prasanna|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2010-01
44巻
開始ページ 42
終了ページ 49
ISSN 1349-6115
言語 English
論文のバージョン publisher
NAID 120002309054
JaLCDOI 10.18926/20012
フルテキストURL Mem_Fac_Eng_OU_29_1_15.pdf
著者 東辻 千枝子| Matsubara, Takeo| Obuchi, Masumi|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1994-11-30
29巻
1号
開始ページ 15
終了ページ 22
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002310919
JaLCDOI 10.18926/15350
フルテキストURL Mem_Fac_Eng_OU_35_29.pdf
著者 島村 薫| Munesawa Yuhji| 内田 哲也|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2001-03-27
35巻
1-2号
開始ページ 29
終了ページ 34
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307155
JaLCDOI 10.18926/15352
フルテキストURL Mem_Fac_Eng_OU_35_35.pdf
著者 島村 薫| 内田 哲也| 井上 智博|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2001-03-27
35巻
1-2号
開始ページ 35
終了ページ 40
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307784
JaLCDOI 10.18926/19622
フルテキストURL Mem_Fac_Eng_OU_31_1_5.pdf
著者 島村 薫| Zhang Chunxiao| 内田 哲也|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1996-12-27
31巻
1号
開始ページ 5
終了ページ 10
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002309167
JaLCDOI 10.18926/19624
フルテキストURL Mem_Fac_Eng_OU_31_1_11.pdf
著者 Zhang Chunxiao| Tanigawa Satoshi| 内田 哲也| 島村 薫|
抄録 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.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1996-12-27
31巻
1号
開始ページ 11
終了ページ 17
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002309203
JaLCDOI 10.18926/14088
フルテキストURL Mem_Fac_Eng_OU_41_1_93.pdf
著者 Tarequl Islam Bhuiyan| 中西 真| 藤井 達生| 高田 潤|
抄録 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).
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2007-01
41巻
1号
開始ページ 93
終了ページ 98
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308163
著者 Faculty of Engineering, Okayama University|
発行日 2004-03
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
38巻
1-2号
資料タイプ その他
著者 Faculty of Engineering, Okayama University|
発行日 2004-03
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
38巻
1-2号
資料タイプ その他
著者 Faculty of Engineering, Okayama University|
発行日 2002-11
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
37巻
1号
資料タイプ その他
著者 Faculty of Engineering, Okayama University|
発行日 2002-11
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
37巻
1号
資料タイプ その他
著者 Faculty of Engineering, Okayama University|
発行日 2003-03
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
37巻
2号
資料タイプ その他
著者 Faculty of Engineering, Okayama University|
発行日 2003-03
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
37巻
2号
資料タイプ その他
著者 Faculty of Engineering, Okayama University|
発行日 2001-12
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
36巻
1号
資料タイプ その他
著者 Faculty of Engineering, Okayama University|
発行日 2001-12
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
36巻
1号
資料タイプ その他