A method for judging faults of 3D body scanner based on standard sphere

Topological tools for the prescribed scalar curvature problem on S n

Open Mathematics ◽

10.2478/s11533-014-0443-9 ◽

2014 ◽

Vol 12 (12) ◽

Author(s):

Dina Abuzaid ◽

Randa Ben Mahmoud ◽

Hichem Chtioui ◽

Afef Rigane

Keyword(s):

Scalar Curvature ◽

Conformal Metrics ◽

Standard Sphere ◽

Multiplicity Results ◽

Existence And Multiplicity ◽

Hopf Formula ◽

Curvature Problem ◽

Formula Type

AbstractIn this paper, we consider the problem of the existence of conformal metrics with prescribed scalar curvature on the standard sphere S n, n ≥ 3. We give new existence and multiplicity results based on a new Euler-Hopf formula type. Our argument also has the advantage of extending well known results due to Y. Li [16].

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Combined17O/1H MRI study in a whole-body scanner

Applied Magnetic Resonance ◽

10.1007/bf03166943 ◽

2003 ◽

Vol 24 (3-4) ◽

pp. 409-415 ◽

Cited By ~ 1

Author(s):

M. Kempka ◽

J. Hankiewicz ◽

D. Fiat

Keyword(s):

Whole Body ◽

Mri Study ◽

Body Scanner

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CCD Camera Calibration Technology Based on the Translation of Coordinate Measuring Machine

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.568-570.320 ◽

2014 ◽

Vol 568-570 ◽

pp. 320-325 ◽

Cited By ~ 2

Author(s):

Feng Shan Huang ◽

Li Chen

Keyword(s):

Coordinate System ◽

Camera Calibration ◽

Characteristic Point ◽

Coordinate Measuring Machine ◽

Ccd Camera ◽

Mathematic Model ◽

Calibration Method ◽

Calibration Characteristic ◽

Standard Sphere ◽

Measuring Machine

A new CCD camera calibration method based on the translation of Coordinate Measuring Machine (CMM) is proposed. The CMM brings the CCD camera to produce the relative translation with respect to the center of the white ceramic standard sphere along the X, Y, Z axis, and the coordinates of the different positions of the calibration characteristic point in the probe coordinate system can be generated. Meanwhile, the camera captures the image of the white ceramic standard sphere at every position, and the coordinates of the calibration characteristic point in the computer frame coordinate system can be registered. The calibration mathematic model was established, and the calibration steps were given and the calibration system was set up. The comparing calibration result shows that precision of this method is equivalent to that of the special calibration method, and the difference between the calibrating data of these two methods is within ±1μm.

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