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Closed-form solution of absolute orientation using unit quaternions

by Berthold K. P. Horn - J. Opt. Soc. Am. A , 1987
"... Finding the relationship between two coordinate systems using pairs of measurements of the coordinates of a number of points in both systems is a classic photogrammetric task. It finds applications in stereophotogrammetry and in robotics. I present here a closed-form solution to the least-squares pr ..."
Abstract - Cited by 989 (4 self) - Add to MetaCart
translational offset is the difference between the centroid of the coordinates in one system and the rotated and scaled centroid of the coordinates in the other system. The best scale is equal to the ratio of the root-mean-square deviations of the coordinates in the two systems from their respective centroids

Responsetime analysis of tasks with offsets

by Karim Traore, Emmanuel Grolleau, Ahmed Rahni, Michaël Richard - In 11th IEEE International Conference on Emerging Technologies and Factory Automation, (ETFA 2006 , 2006
"... Abstract — This article presents some results about schedulability analysis of tasks with offsets also known as transactions, in the particular case of monotonic transactions. The impact of a transaction on the response time of a lower priority task under analysis is computed with the interference i ..."
Abstract - Cited by 3 (0 self) - Add to MetaCart
Abstract — This article presents some results about schedulability analysis of tasks with offsets also known as transactions, in the particular case of monotonic transactions. The impact of a transaction on the response time of a lower priority task under analysis is computed with the interference

Self-calibration of a rotating camera with a translational offset

by Qiang Ji, Songtao Dai - IEEE Transactions on Robotics and Automation , 2004
"... Abstract—Camera self calibration, based on a purely rotational movement of the camera, receives the most attention among different camera self-calibration methods due to its algorithmic simplicity. The existing purely rotational methods, however, assume camera rotates around its optical center, ther ..."
Abstract - Cited by 3 (0 self) - Add to MetaCart
, therefore yielding no translation offset. This assumption is not realistic, since in practice, the precise location of the optical center is often unknown, and the rotation is often performed about an unknown but fixed point near the optical center. The conventional methods tend to ignore the offset

Offset-Polygon Annulus Placement Problems

by Gill Barequet, Amy J. Briggs, Matthew T. Dickerson, Michael T. Goodrich , 1997
"... In this paper we address several variants of the polygon annulus placement problem: given an input polygon P and a set S of points, find an optimal placement of P that maximizes the number of points in S that fall in a certain annulus region defined by P and some offset distance ffi ? 0. We address ..."
Abstract - Cited by 9 (4 self) - Add to MetaCart
In this paper we address several variants of the polygon annulus placement problem: given an input polygon P and a set S of points, find an optimal placement of P that maximizes the number of points in S that fall in a certain annulus region defined by P and some offset distance ffi ? 0. We

Verifiable Rotation of Homomorphic Encryptions

by Sebastiaan De Hoogh, Berry Schoenmakers, Jose ́ Villegas
"... Abstract. Similar to verifiable shuffling (or, mixing), we consider the problem of verifiable rotating (and random re-encrypting) a given list of homomorphic encryptions. The offset by which the list is rotated (cyclic shift) should remain hidden. Basically, we will present zero-knowledge proofs of ..."
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Abstract. Similar to verifiable shuffling (or, mixing), we consider the problem of verifiable rotating (and random re-encrypting) a given list of homomorphic encryptions. The offset by which the list is rotated (cyclic shift) should remain hidden. Basically, we will present zero-knowledge proofs

VIBRATIONS OF A ROTOR SYSTEM WITH MULTIPLE COUPLER OFFSETS

by Chao-yang Tsai, Shyh-chin Huang, Du Coupleur , 2009
"... In this paper, a transfer matrix method (TMM) for rotors with multiple coupler offsets was derived. The studies showed the coupler’s stiffness altered the rotor’s critical speeds but offset caused additional external excitation. The cases of two offsets in- and anti-phase in a typical rotor were giv ..."
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given as examples. In the in-phase case, significantly increased response amplitude occurred at lower rotational speed and the increase was linearly proportional to the offset value. As to the anti-phase case, the increased response was insignificant, implying an opposite offset would cancel out a major

A Ball and Curved Offset Beam Experiment

by Jansen Sheng , Jay Renner , William S Levine
"... Abstract-The straight beam in the ball and beam control experiment was replaced by a curved beam mounted away from its center of rotation. The resulting system is much harder to understand, model and control than the ball and straight beam. Nonetheless, the apparatus was constructed, a model was de ..."
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Abstract-The straight beam in the ball and beam control experiment was replaced by a curved beam mounted away from its center of rotation. The resulting system is much harder to understand, model and control than the ball and straight beam. Nonetheless, the apparatus was constructed, a model

Characterization and Analysis of Tasks with Offsets : Monotonic Transactions, proc

by Karim Traore, Emmanuel Grolleau, Francis Cottet - 12th International Conference on Embedded and Real-Time Computing Systems and Applications, RTCSA 2006, August 16-18th 2006
"... This article introduces the concept of monotonic transactions. A monotonic transaction is a particular case of transactions for which the load arrival pattern is (or can be by rotation) localized at the beginning of the transaction. In the general context of tasks with offsets(general transactions) ..."
Abstract - Cited by 3 (2 self) - Add to MetaCart
This article introduces the concept of monotonic transactions. A monotonic transaction is a particular case of transactions for which the load arrival pattern is (or can be by rotation) localized at the beginning of the transaction. In the general context of tasks with offsets(general transactions

Blind estimation of multiple carrier frequency offsets

by Yuanning Yu, Athina P. Petropulu, H. Vincent Poor, Visa Koivunen - in IEEE PIMRC , 2007
"... Multiple carrier-frequency offsets (CFO) arise in a distributed antenna system, where data are transmitted simultaneously from multiple antennas. In such systems the received signal contains multiple CFOs due to mismatch between the local oscillators of transmitters and receiver. This results in a t ..."
Abstract - Cited by 4 (0 self) - Add to MetaCart
Multiple carrier-frequency offsets (CFO) arise in a distributed antenna system, where data are transmitted simultaneously from multiple antennas. In such systems the received signal contains multiple CFOs due to mismatch between the local oscillators of transmitters and receiver. This results in a

Clinical Study Radiographic Determination of Hip Rotation Center and Femoral Offset in Japanese Adults: A Preliminary Investigation

by unknown authors
"... Copyright © 2015 Taichiro Takamatsu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The values of hip rotation center (HRC) an ..."
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Copyright © 2015 Taichiro Takamatsu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The values of hip rotation center (HRC
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