result 25029 件
| JaLCDOI | 10.18926/44499 |
|---|---|
| FullText URL | mfe_045_046_053.pdf |
| Author | Nogami, Yasuyuki| Yanagi, Erika| Izuta, Tetsuya| Morikawa, Yoshitaka| |
| Abstract | Recently, composite order pairing–based cryptographies have received much attention. The composite order needs to be as large as the RSA modulus. Thus, they require a certain pairing–friendly elliptic curve that has such a large composite order. This paper proposes an efficient algorithm for generating an ordinary pairing–friendly elliptic curve of the embedding degree 1 whose order has two large prime factors as the RSA modulus. In addition, the generated pairing–friendly curve has an efficient structure for the Gallant–Lambert–Vanstone (GLV) method. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2011-01 |
| Volume | volume45 |
| Start Page | 46 |
| End Page | 53 |
| ISSN | 1349-6115 |
| language | English |
| Copyright Holders | Copyright © by the authors |
| File Version | publisher |
| NAID | 120002905955 |
| JaLCDOI | 10.18926/44498 |
|---|---|
| FullText URL | mfe_045_036_045.pdf |
| Author | Kanatani, Kenichi| Niitsuma, Hirotaka| |
| Abstract | We present a new method for optimally computing the 3-D rotation from two sets of 3-D data. Unlike 2-D data, the noise in 3-D data is inherently inhomogeneous and anisotropic, reflecting the characteristics of the 3-D sensing used. To cope with this, Ohta and Kanatani introduced a technique called “renormalization”. Following them, we represent a 3-D rotation in terms of a quaternion and compute an exact maximum likelihood solution using the FNS of Chojnacki et al. As an example, we consider 3-D data obtained by stereo vision and optimally compute the 3-D rotation by analyzing the noise characteristics of stereo reconstruction. We show that the widely used method is not suitable for 3-D data. We confirm that the renormalization of Ohta and Kanatani indeed computes almost an optimal solution and that, although the difference is small, the proposed method can compute an even better solution. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2011-01 |
| Volume | volume45 |
| Start Page | 36 |
| End Page | 45 |
| ISSN | 1349-6115 |
| language | English |
| Copyright Holders | Copyright © by the authors |
| File Version | publisher |
| NAID | 80021759250 |
| JaLCDOI | 10.18926/44497 |
|---|---|
| FullText URL | mfe_045_027_036.pdf |
| Author | Kanatani, Kenichi| Sugaya, Yasuyuki| |
| Abstract | We describe in detail the algorithm of bundle adjustment for 3-D reconstruction from multiple images based on our latest research results. The main focus of this paper is on the handling of camera rotations and the efficiency of computation and memory usage when the number of variables is very large; an appropriate consideration of this is the core of the implementation of bundle adjustment. Computing the fundamental matrix from two views and reconstructing the 3-D structure from multiple views, we evaluate the performance of our algorithm and discuses technical issues of bundle adjustment implementation. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2011-01 |
| Volume | volume45 |
| Start Page | 27 |
| End Page | 35 |
| ISSN | 1349-6115 |
| language | English |
| Copyright Holders | Copyright © by the authors |
| File Version | publisher |
| NAID | 80021759249 |
| JaLCDOI | 10.18926/44496 |
|---|---|
| FullText URL | mfe_045_015_026.pdf |
| Author | Kanatani, Kenichi| Rangrajan, Prasanna| Sugaya, Yasuyuki| Niitsuma, Hirotaka| |
| Abstract | We present a new least squares (LS) estimator, called “HyperLS”, specifically designed for parameter estimation in computer vision applications. It minimizes the algebraic distance under a special scale normalization, which is derived by rigorous error analysis in such a way that statistical bias is removed up to second order noise terms. Numerical experiments suggest that our HyperLS is far superior to the standard LS and comparable in accuracy to maximum likelihood (ML), which is known to produce highly accurate results in image applications but may fail to converge if poorly initialized. Our HyperLS is a perfect candidate for ML initialization. In addition, we discuss how image-based inference problems have different characteristics form conventional statistical applications, with a view to serving as a bridge between mathematicians and computer engineers. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2011-01 |
| Volume | volume45 |
| Start Page | 15 |
| End Page | 26 |
| ISSN | 1349-6115 |
| language | English |
| Copyright Holders | Copyright © by the authors |
| File Version | publisher |
| NAID | 120002905952 |
| JaLCDOI | 10.18926/44495 |
|---|---|
| FullText URL | mfe_045_001_014.pdf |
| Author | Akiyoshi, Tatsuro| Imai, Jun| Konishi, Masami| |
| Abstract | This paper presents a method of the controller design for the handling machine by using dsPIC(Digital Signal Processor + Peripheral Interface Controller). Recently, many manufacturing robots are operated in manufacturing facilities, with the aim of labor, cost saving, and improvement of the productivity. Such robots need to have positioning performance of high precision and simultaneously to save cost. In this paper, a digital optimal servo controller is designed, and it is implemented into our barebones controller which involves dsPIC. We have designed and manufactured the controller which is added suitable peripherals to improve the consistency between the mechanical machine operating in continuous time and controller in discrete time. The significance of this research is that digital implementation of the embedded system which has performance-limitation has ensured a comparable result, against the one with PC which has broad utility. When it is used as a controller, it is possible to restrain product prices greatly equivalent PC precision. We demonstrate potential that good control can be achieved even with low cost. Our research has lead to the viability of lower cost and higher performance system for the production process at factories. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 2011-01 |
| Volume | volume45 |
| Start Page | 1 |
| End Page | 14 |
| ISSN | 1349-6115 |
| language | English |
| Copyright Holders | Copyright © by the authors |
| File Version | publisher |
| NAID | 120002905951 |
| Author | 西山 康一| |
|---|---|
| Published Date | 2011-02-01 |
| Publication Title | 岡山大学文学部プロジェクト研究報告書 |
| Volume | volume16 |
| Content Type | Research Paper |
| Author | Graduate School of Humanities and Social Sciences, Okayama University| |
|---|---|
| Published Date | 2011-03-25 |
| Publication Title | 文化共生学研究 |
| Volume | volume10 |
| Content Type | Others |
| Author | Sawayama, Mikako| |
|---|---|
| Published Date | 2011-03-25 |
| Publication Title | 文化共生学研究 |
| Volume | volume10 |
| Content Type | Departmental Bulletin Paper |
| JaLCDOI | 10.18926/44458 |
| Author | Imoto, Mari| |
|---|---|
| Published Date | 2011-03-25 |
| Publication Title | 文化共生学研究 |
| Volume | volume10 |
| Content Type | Departmental Bulletin Paper |
| JaLCDOI | 10.18926/44457 |
| Author | Shishido, Keisuke| |
|---|---|
| Published Date | 2011-03-25 |
| Publication Title | 文化共生学研究 |
| Volume | volume10 |
| Content Type | Departmental Bulletin Paper |
| JaLCDOI | 10.18926/44456 |
| Author | Yamaguchi, Kazuko| |
|---|---|
| Published Date | 2011-03-25 |
| Publication Title | 文化共生学研究 |
| Volume | volume10 |
| Content Type | Departmental Bulletin Paper |
| JaLCDOI | 10.18926/44455 |
| JaLCDOI | 10.18926/44454 |
|---|---|
| Title Alternative | American Social Skills Training as Preparation for Studying Abroad in the U.S.A: Advanced Level Study Focusing on Tasks Concerning Assertion |
| FullText URL | scs_010_103_118.pdf |
| Author | Tanaka, Tomoko| Takahama, Ai| |
| Publication Title | 文化共生学研究 |
| Published Date | 2011-03-25 |
| Volume | volume10 |
| Start Page | 103 |
| End Page | 118 |
| ISSN | 1880-9162 |
| language | Japanese |
| Copyright Holders | Copyright © 2011 岡山大学大学院社会文化科学研究科 |
| File Version | publisher |
| NAID | 120002905943 |
| Author | Kobayashi, Takayuki| |
|---|---|
| Published Date | 2011-03-25 |
| Publication Title | 文化共生学研究 |
| Volume | volume10 |
| Content Type | Departmental Bulletin Paper |
| JaLCDOI | 10.18926/44453 |
| Author | Kitagawa, Hirofumi| |
|---|---|
| Published Date | 2011-03-25 |
| Publication Title | 文化共生学研究 |
| Volume | volume10 |
| Content Type | Departmental Bulletin Paper |
| JaLCDOI | 10.18926/44452 |
| Author | Agatsuma, Satoshi| |
|---|---|
| Published Date | 2011-03-25 |
| Publication Title | 文化共生学研究 |
| Volume | volume10 |
| Content Type | Departmental Bulletin Paper |
| JaLCDOI | 10.18926/44451 |
| Author | Schirmann, Sylvain| Hatano, Satoshi| |
|---|---|
| Published Date | 2011-03-25 |
| Publication Title | 文化共生学研究 |
| Volume | volume10 |
| Content Type | Departmental Bulletin Paper |
| JaLCDOI | 10.18926/44450 |
| Author | Graduate School of Humanities and Social Sciences, Okayama University| |
|---|---|
| Published Date | 2011-03-25 |
| Publication Title | 文化共生学研究 |
| Volume | volume10 |
| Content Type | Others |
| Author | Graduate School of Humanities and Social Sciences, Okayama University| |
|---|---|
| Published Date | 2011-03-25 |
| Publication Title | 文化共生学研究 |
| Volume | volume10 |
| Content Type | Others |
| Author | Graduate School of Humanities and Social Sciences Okayama University| |
|---|---|
| Published Date | 2011-03-25 |
| Publication Title | 岡山大学大学院社会文化科学研究科紀要 |
| Volume | volume31 |
| Content Type | Others |
| Author | Graduate School of Humanities and Social Sciences Okayama University| |
|---|---|
| Published Date | 2011-03-25 |
| Publication Title | 岡山大学大学院社会文化科学研究科紀要 |
| Volume | volume31 |
| Content Type | Others |
