WO1998005157A3 - High accuracy calibration for 3d scanning and measuring systems - Google Patents

High accuracy calibration for 3d scanning and measuring systems Download PDF

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Publication number
WO1998005157A3
WO1998005157A3 PCT/US1997/011766 US9711766W WO9805157A3 WO 1998005157 A3 WO1998005157 A3 WO 1998005157A3 US 9711766 W US9711766 W US 9711766W WO 9805157 A3 WO9805157 A3 WO 9805157A3
Authority
WO
WIPO (PCT)
Prior art keywords
scanning
image collector
calibration
parameters
light source
Prior art date
Application number
PCT/US1997/011766
Other languages
French (fr)
Other versions
WO1998005157A2 (en
Inventor
Alexander A Migdal
Alexei Lebedev
Michael Petrov
Alexander Zhilyaev
Original Assignee
Real Time Geometry Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Real Time Geometry Corp filed Critical Real Time Geometry Corp
Priority to AU36524/97A priority Critical patent/AU3652497A/en
Publication of WO1998005157A2 publication Critical patent/WO1998005157A2/en
Publication of WO1998005157A3 publication Critical patent/WO1998005157A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
    • G01B11/2504—Calibration devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/245—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures using a plurality of fixed, simultaneously operating transducers

Abstract

A system for calibration of a scanning system, which provides an object (101) for calibration of a known geometry. The object is marked with a pattern of geometric shapes, such as set of equilateral triangles or their vertices. A set of computer programmed elements process photographic images of the object and scanned images of the object to calibrate parameters, including a focal point (145) relationship value for scanning systems which uses an image collector (147), a set of values to correct for distortion of the lens (144), the relative distance between the image collector and the light source (146) and an initial angle to determine light position scanning. The known geometric constraints of the object allow the location of the object and computing 3D X, Y, Z coordinates for those against a constraint that the X, Y, Z coordinates fit onto the surface of the object, the system calibrates parameters pertaining to the relative distance between the image collector and light source and other parameters.
PCT/US1997/011766 1996-07-12 1997-07-02 High accuracy calibration for 3d scanning and measuring systems WO1998005157A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU36524/97A AU3652497A (en) 1996-07-12 1997-07-02 High accuracy calibration for 3d scanning and measuring systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/678,804 1996-07-12
US08/678,804 US5991437A (en) 1996-07-12 1996-07-12 Modular digital audio system having individualized functional modules

Publications (2)

Publication Number Publication Date
WO1998005157A2 WO1998005157A2 (en) 1998-02-05
WO1998005157A3 true WO1998005157A3 (en) 1998-04-30

Family

ID=24724354

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/011766 WO1998005157A2 (en) 1996-07-12 1997-07-02 High accuracy calibration for 3d scanning and measuring systems

Country Status (3)

Country Link
US (1) US5991437A (en)
AU (1) AU3652497A (en)
WO (1) WO1998005157A2 (en)

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Also Published As

Publication number Publication date
AU3652497A (en) 1998-02-20
US5991437A (en) 1999-11-23
WO1998005157A2 (en) 1998-02-05

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