The United States Geological Survey (USGS) in cooperation with The Ohio State University (OSU) and Calgary University (CU) have developed procedures and software for the efficient calibration of metric quality aerial cameras; both filmand CCD-based sensors. With the advent of the Global Positioning System (GPS), and its efficient use to position the exposure station of the aerial camera, it bec...

Camera calibration is the process of estimating the parameters of the camera. There are two sets of parameters for a camera: intrinsic parameters, and extrinsic parameters. It is generally assumed that we know the coordinates of a set of points in the world reference frame and their corresponding points in one or more images. The notations used and the general problem of calibration is describe...

This paper describes a new robust and fully automatic method for calibration of three-dimensional (3D) freehand ultrasound. 3D Freehand ultrasound consists in mounting a position sensor on a standard probe. The echographic B-scans can be localized in 3D, and can be compounded into a volume. However, especially for quantitative use, this process dramatically requires a calibration procedure that...

A growing number of modern applications such as position determination, online object recognition and collision prevention depend on accurate scene analysis. A low-cost and fast alternative to standard techniques like laser scanners or stereo vision is the distance measurement with modulated, coherent infrared light based on the Photo Mixing Device (PMD) technique. This paper describes an enhan...

In this paper we present a technique for the accurate calibration of a multiple-camera image acquisition systems used for applications to 3D reconstruction of scenes. The main characteristic of this technique is the fact that it allows us to obtain highly accurate calibrations even when using a very simple and inexpensive calibration target such as a planar pattern. This has been made possible ...

The measurements repeat 10 times, and the averages of the error measures are listed in Table III. As can be seen in Table III, the orientation errors of the planar features are all very small. The average absolute position error using the linear method is 82.62 m, and the average location error of planar features is 53.12 m. Using the proposed method, the average absolute position error is redu...

A recently developed kinematic calibration technique for 6 degree-of-freedom (DOF) arms, the Jacobian measurement method, is generalized to include underconstrained and overconstrained arms. Using joint torque sensing and a wrist 6-axis force/torque sensor to measure the Jacobian, experimental results are presented for the rst 5 DOFs of the Sarcos Dextrous Arm. Results are compared to two stand...

This work presents a solution for self-positioning (i.e. heading angle and offset) a vision system with respect to a line and the calibration of the single vision system. The tools Hough transform and camera model are used to obtain the position of the camera. The calibration procedure proposed calculates several parameters, which are used in the positioned process of the vision system. Experim...

Topography-induced variation of radar brightness still poses a problem in terms of radiometric calibration of SAR data, which is undoubtedly an indispensable step in order to deduce bioor geophysical parameters from amplitude images. We propose an integrated focusing and calibration procedure for airborne SAR data based on the time-domain backprojection technique. With the help of sensor positi...

A vision sensor calibration method based on flexible three-dimensional (3d) target and invariance of cross ratio is proposed. Flexible 3d target is obtained by moving planar target to different positions. According to the relative position relationship of planar targets in the different positions, unify target points to the base coordinate frame of the flexible 3d target. Using the invariance o...