Results 1  10
of
545,740
Accuracy of velocity estimation by Reichardt correlators
 Journal of the Optical Society of America A
, 2001
"... Although a great deal of experimental evidence supports the notion of a Reichardt correlator as a mechanism for biological motion detection, the correlator does not signal true image velocity. This study examines the accuracy with which realistic Reichardt correlators can provide velocity estimates ..."
Abstract

Cited by 27 (4 self)
 Add to MetaCart
Although a great deal of experimental evidence supports the notion of a Reichardt correlator as a mechanism for biological motion detection, the correlator does not signal true image velocity. This study examines the accuracy with which realistic Reichardt correlators can provide velocity estimates
Short Note Matching dips in velocity estimation
"... Accurate velocity estimation is essential to obtain a good migrated image and accurate resevoir attributes (Claerbout, 1999). The problem is that tomographic velocity estimation is an underdetermined problem. We can reduce the null space of the tomographic process by adding ..."
Abstract
 Add to MetaCart
Accurate velocity estimation is essential to obtain a good migrated image and accurate resevoir attributes (Claerbout, 1999). The problem is that tomographic velocity estimation is an underdetermined problem. We can reduce the null space of the tomographic process by adding
A Simple Estimator of Cointegrating Vectors in Higher Order Cointegrated Systems
 ECONOMETRICA
, 1993
"... Efficient estimators of cointegrating vectors are presented for systems involving deterministic components and variables of differing, higher orders of integration. The estimators are computed using GLS or OLS, and Wald Statistics constructed from these estimators have asymptotic x2 distributions. T ..."
Abstract

Cited by 507 (3 self)
 Add to MetaCart
Efficient estimators of cointegrating vectors are presented for systems involving deterministic components and variables of differing, higher orders of integration. The estimators are computed using GLS or OLS, and Wald Statistics constructed from these estimators have asymptotic x2 distributions
DiscreteTime Adaptive Windowing for Velocity Estimation
, 2000
"... We present methods for velocity estimation from discrete and quantized position samples using adaptive windowing. Previous methods necessitate tradeoffs between noise reduction, control delay, estimate accuracy, reliability, computational load, transient preservation, and difficulties with tuning. I ..."
Abstract

Cited by 57 (9 self)
 Add to MetaCart
We present methods for velocity estimation from discrete and quantized position samples using adaptive windowing. Previous methods necessitate tradeoffs between noise reduction, control delay, estimate accuracy, reliability, computational load, transient preservation, and difficulties with tuning
Improved Velocity Estimation Using Single Loop Detectors
, 2000
"... This paper develops an improved algorithm for estimating velocity from single loop detector data. Unlike preceding works, the algorithm is simple enough that it can be implemented using existing controller hardware. The discussion shows how the benefits of this work extend to automated tests of dete ..."
Abstract

Cited by 43 (4 self)
 Add to MetaCart
This paper develops an improved algorithm for estimating velocity from single loop detector data. Unlike preceding works, the algorithm is simple enough that it can be implemented using existing controller hardware. The discussion shows how the benefits of this work extend to automated tests
Velocity Estimation For Haptic Applications BaHai Nguyen
"... Abstract—This paper presents a detailed approach and the main results of realtime velocity estimation based on the dynamic model of a DC motor. The key contribution of velocity estimation here is to reduce noise behaviors of encoderbased measurement. In particular, the estimated signal can be usef ..."
Abstract
 Add to MetaCart
Abstract—This paper presents a detailed approach and the main results of realtime velocity estimation based on the dynamic model of a DC motor. The key contribution of velocity estimation here is to reduce noise behaviors of encoderbased measurement. In particular, the estimated signal can
Determining Optical Flow
 ARTIFICIAL INTELLIGENCE
, 1981
"... Optical flow cannot be computed locally, since only one independent measurement is available from the image sequence at a point, while the flow velocity has two components. A second constraint is needed. A method for finding the optical flow pattern is presented which assumes that the apparent veloc ..."
Abstract

Cited by 2379 (9 self)
 Add to MetaCart
Optical flow cannot be computed locally, since only one independent measurement is available from the image sequence at a point, while the flow velocity has two components. A second constraint is needed. A method for finding the optical flow pattern is presented which assumes that the apparent
Representing Moving Images with Layers
, 1994
"... We describe a system for representing moving images with sets of overlapping layers. Each layer contains an intensity map that defines the additive values of each pixel, along with an alpha map that serves as a mask indicating the transparency. The layers are ordered in depth and they occlude each o ..."
Abstract

Cited by 542 (11 self)
 Add to MetaCart
other in accord with the rules of compositing. Velocity maps define how the layers are to be warped over time. The layered representation is more flexible than standard image transforms and can capture many important properties of natural image sequences. We describe some methods for decomposing image
Performance of a Vector Velocity Estimator
 In Proc. IEEE Ultrason. Symp
, 1998
"... It is a wellknown limitation of all commercially available scanners that only the velocity component along the propagation direction of the emitted pulse is measured, when evaluating blood velocities with ultrasound. Proposals for solving this limitation using several transducers or speckle trackin ..."
Abstract

Cited by 1 (1 self)
 Add to MetaCart
tracking can be found in the literature, but no method with a satisfactory performance has been found that can be used in a commercial implementation. A method for estimation of the velocity vector is presented. Here an oscillation transverse to the ultrasound beam is generated, so that a transverse
Results 1  10
of
545,740