Surgical cameras are prevalent in modern operating theatres and are often used as a surrogate for direct vision. Visualisation techniques (e.g. image fusion) made possible by tracking the camera require accurate hand-eye calibration between the camera and the tracking system. The authors introduce the concept of 'guided hand-eye calibration', where calibration measurements are facilitated by a ...

The virtual musical instrument is an interface that allows users to simulate a musical instrument by printing a template on a sheet of paper, placing it in view of the webcam of their laptop, and running the console application. The user then ’plays’ the virtual instrument as if it were a real one, and appropriate music is generated. This is achieved by calibration of the template, detecting th...

In order to achieve high-precision three-dimensional (3-D) imaging with an airborne downward-looking linear-array 3-D synthetic aperture radar (LA-3D-SAR), a uniform virtual antenna array can be obtained by aperture synthesis of the cross-track sparse multiple-inputmultiple-output array. However, the actual 3-D imaging quality is unavoidably degraded by array errors such as the multichannel amp...

A vision sensor is mounted on a robot to detect surrounding objects. Its mounting position and orientation must be identified, resulting in an extrinsic calibration problem. This paper presents three classes of extrinsic calibration procedures. All use closed-form solutions. The class A calibration procedure requires a reference object at a precalibrated location. The class B calibration proced...

The aim of this study was to establish the optimal methodology for skin-fixed measurement of the scapula during dynamic movement. This was achieved by comparing an optimally positioned Scapula Tracker device (ST) to a previously described palpation device, taken as the true measure of scapular kinematics. These measurements were compared across a range of calibration positions, including the us...

Inertial navigation is a device, which estimates its position, based on sensing external conditions (such as acceleration or angular velocity). It widely used in variuos applications. Its presence drone vehicle for example, allows flight stabilization, by position estimation and feedback-based regulation algorithm execution. A smartphone makes use of inertial detecting movement flipping screen ...

BACKGROUND Respiratory effort belt measurement is a widely used method to monitor respiration. Signal waveforms of respiratory volume and flow may indicate pathological signs of several diseases and, thus, it would be highly desirable to predict them accurately. Calibrated effort belts are sufficiently accurate for estimating respiratory rate, but the respiratory volume and flow prediction accu...

This paper describes a method of mirror localization to calibrate a catadioptric imaging system. While the calibration of a catadioptric system includes the estimation of various parameters, we focus on the localization of the mirror. The proposed method estimates the position of the mirror by observing pairs of parallel lights, which are projected from various directions. Although some earlier...

We present a novel technique for calibrating a zooming camera based on the invariance properties of the Normalized Image of the Absolute Conic (NIAC). First, we show that the camera parameters (independent of the position, orientation and zooming) are determined uniquely by the NIAC. Then, we exploit the invariance properties to develop a stratified calibration method that decouples the calibra...

We are interested in the task of speech beamforming in conference room meetings, with microphones built in the electronic devices brought and casually placed by meeting participants. This task is challenging because of the inaccuracy in position and interference calibration due to random microphone configuration, variance of microphone quality, reverberation etc. As a result, not many beamformi...