The periodic disturbances caused by the inherent eccentricity and unbalancing in compact disc systems is one of the prominent radial-tracking problems in high-speed and high-density optical storage systems. To compensate these periodic disturbances, an adaptive feedforward compensation technique is presented and investigated with the aim to have cost-effective optical disc drive manufacturing. ...

Nonmechanical beam deflectors, particularly acousto-optical and electro-optical deflectors, are being considered for the access and tracking functions of a magneto-optic recording head. In this report, the suitability of electro-optic deflectors for these functions is explored. For applications requiring modest deflection, electro.optic deflectors require less power and exhibit higher optical t...

This paper addresses the problem of applying powerful pattern recognition algorithms based on kernels to efficient visual tracking. Recently Avidan [1] has shown that object recognizers using kernel-SVMs can be elegantly adapted to localization by means of spatial perturbation of the SVM, using optic flow. Whereas Avidan’s SVM applies to each frame of a video independently of other frames, the ...

This paper proposes a novel approach and a system for object detection and tracking using video sensors. Optical Flow technique is used to derive the dynamic scene properties from the image sequences captured from stereo CCD cameras. Here, it is proposed to use the K-means clustering algorithm along with a template matching algorithm to identify the target from the 2D optical flow fields. Visua...

Dense and accurate motion tracking is an important requirement for many video feature extraction algorithms. In this paper we provide a method for computing point trajectories based on a fast parallel implementation of a recent optical flow algorithm that tolerates fast motion. The parallel implementation of large displacement optical flow runs about 78× faster than the serial C++ version. This...

The proposed tracking technique allows to realize the direct interaction and control in augmented reality. The geometry and the optical properties of the display system in Virtual and Augmented Reality (V&AR) can be used as the channel of the additional information to perform tracking and interaction with an application.

We present our latest results in static compressive tracking and imaging. We have developed a design methodology using the compressed sensing concept of mutual coherence. We also elucidate a modified calibration scheme that boosts compressive imaging capabilities. © 2012 Optical Society of America OCIS codes: (110.1758) Computational imaging; (100.4999) Pattern recognition, target tracking

PURPOSE The aim of this study is to evaluate the tracking accuracy of a commercial ultrasound system under relevant treatment conditions and demonstrate its clinical utility for detecting significant treatment deviations arising from inadvertent intrafractional target motion. METHODS A multimodality male pelvic phantom was used to simulate prostate image-guided radiotherapy with the system un...

Cognitive informatics (CI) is a research area including some interdisciplinary topics. Visual tracking is not only an important topic in CI, but also a hot topic in computer vision and facial expression recognition. In this paper, a novel and robust facial feature tracking method is proposed, in which KanadeLucas-Tomasi (KLT) optical flow is taken as basis. The prior method of measurement consi...

Biological nanoparticles (BNPs) are of high interest due to their key role in various biological processes and use as biomarkers. BNP size and composition are decisive for their functions, but simultaneous determination of both properties with high accuracy remains challenging. Optical microscopy allows precise determination of fluorescence/scattering intensity, but not the size of individual B...