Effects of camera calibration errors are investigated in static-eye configuration. The effect of the error in the extrinsic parameters of the camera to extract and predict the position of a flying object in a 3D environment using Recursive Least Squares (RLS) is analyzed. Simulations have been carried in order to minimize the error of the position predicted in the global reference frame modifyi...

In intensity modulated radiation treatments (IMRT), the position of the field edges and the modulation within the beam are often achieved with a multileaf collimator (MLC). During the MLC calibration process, due to the finite accuracy of leaf position measurements, a systematic error may be introduced to leaf positions. Thereafter leaf positions of the MLC depend on the systematic error introd...

A calibration target can be imaged to provide correspondences between points in the image and points in space. It is, however, generally impractical to position the calibration target accurately with respect to the camera coordinate system using only mechanical means. As a result, the relationship between the target coordinate systemand the camera coordinate system typically also needs to be re...

INTRODUCTION High-accuracy rotary encoders are required for rotational axis position measurement in ultraprecision manufacturing and measurement equipments. A typical rotary encoder is made of a glass disk with a fine grating pattern and a scanning read head unit. Digital pulse trains are output from the read head to represent the disk rotary position. The angular measurement accuracy of such a...

Position and angle errors are an obstacle to accurate, high-speed control of micro-robots in a robot soccer system. Systematic errors resulting from constraints on the global imaging system are identified, and their magnitude estimated. A full calibration procedure is proposed to minimise these errors that only uses information available from the soccer field. This calibration method has a resi...

We describe a calibration and rendering technique for a projector that can render rectangular images under keystoned position. The projector utilizes a rigidly attached camera to form a stereo pair. We describe a very easy to use technique for calibration of the projector-camera pair using only black planar surfaces. We present an efficient rendering method to pre-warp images so that they appea...

Purpose – The purpose of this paper is to describe a calibration method developed to improve the accuracy of a six degrees-of-freedom medical robot. The proposed calibration approach aims to enhance the robot’s accuracy in a specific target workspace. A comparison of five observability indices is also done in order to choose the most appropriate calibration robot configurations. Design/methodol...

A method is described and validated for the automatic calibration of analog sine-wave quadrature sensors, such as optical encoders, embedded in a functioning system. The algorithm uses a Kalman filter to estimate the true position of the direct-drive actuated joint using a model of it's dynamics, an applied actuator command, and measurements from the uncalibrated sensor. From the estimated true...

ABSTRACT Observation of the redshifted 21-cm signal from Cosmic Dawn and Epoch Reionization is a challenging endeavor in observational cosmology. Presence orders magnitude brighter astrophysical foregrounds various instrumental systematics increases complexity these observations. This work presents an end-to-end pipeline dealing with synthetic interferometric data sensitive radio The mock sky m...