WO1990009561A3 - Tele-imagerie par laser utilisant une geometrie projective - Google Patents

Tele-imagerie par laser utilisant une geometrie projective Download PDF

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Publication number
WO1990009561A3
WO1990009561A3 PCT/US1990/000832 US9000832W WO9009561A3 WO 1990009561 A3 WO1990009561 A3 WO 1990009561A3 US 9000832 W US9000832 W US 9000832W WO 9009561 A3 WO9009561 A3 WO 9009561A3
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WO
WIPO (PCT)
Prior art keywords
projective geometry
imaging system
range imaging
electronic
laser range
Prior art date
Application number
PCT/US1990/000832
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English (en)
Other versions
WO1990009561A2 (fr
Inventor
Constantine J Tsikos
Original Assignee
Constantine J Tsikos
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 Constantine J Tsikos filed Critical Constantine J Tsikos
Publication of WO1990009561A2 publication Critical patent/WO1990009561A2/fr
Publication of WO1990009561A3 publication Critical patent/WO1990009561A3/fr

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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
    • G01B11/2518—Projection by scanning of the object
    • G01B11/2522—Projection by scanning of the object the position of the object changing and being recorded
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/147—Details of sensors, e.g. sensor lenses

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

Télé-imagerie, et procédé d'étalonnage d'un tel système, se fondant sur les principes de la géométrie projective. Ledit système comprend quatre sous-systèmes: (1) une lentille ou un miroir oscillant laser et une lentille ou un miroir oscillant cylindrique pour produire un rayon lumineux en plan; (2) une caméra électronique équipée d'une lentille et d'un filtre d'interférence approprié; (3) un circuit électronique de mesures de la hauteur (profondeur) et un générateur d'image vidéo; et (4) un mécanisme de balayage permettant de déplacer l'objet par rapport au faisceau lumineux et à la caméra de manière à pouvoir balayer une zone de la surface de l'objet. L'étalonnage du système se fait par la détermination de la position de la surface de l'objet dans l'image à trois hauteurs différentes. A partir de ces trois hauteurs, on peut produire la télé-image soit par une table de référence prédéterminée soit par un calcul se fondant sur l'invariance du biquotient, qui est un rapport bien connu en géométrie projective.
PCT/US1990/000832 1989-02-17 1990-02-15 Tele-imagerie par laser utilisant une geometrie projective WO1990009561A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/312,635 US4979815A (en) 1989-02-17 1989-02-17 Laser range imaging system based on projective geometry
US312,635 1989-02-17

Publications (2)

Publication Number Publication Date
WO1990009561A2 WO1990009561A2 (fr) 1990-08-23
WO1990009561A3 true WO1990009561A3 (fr) 1990-10-04

Family

ID=23212346

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1990/000832 WO1990009561A2 (fr) 1989-02-17 1990-02-15 Tele-imagerie par laser utilisant une geometrie projective

Country Status (3)

Country Link
US (1) US4979815A (fr)
IL (1) IL93292A0 (fr)
WO (1) WO1990009561A2 (fr)

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PATENT ABSTRACTS OF JAPAN, Volume 10, No. 127 (P-455) (2184), 13 May 1986, & JP-A-60253806 (Toyoda Chuo Kenkyusho K.K.) 14 December 1985 *
PATENT ABSTRACTS OF JAPAN, Volume 10, No. 183 (P-472) (2239), 26 June 1986; & JP-A-6129706 (Matsushita Electric Works Ltd) 10 February 1986 *
PATENT ABSTRACTS OF JAPAN, Volume 10, No. 183 (P-472) (2239), 26 June 1986; & JP-A-6131906 (Hitachi Zosen Corp.) 14 February 1986 *
Proceedings IEEE Computer Society Conference on Pattern Recognition and Image Processing, Las Vegas, Nevada, 14-17 June 1982, IEEE, (New York, US), J.B.K. TIO et al.: "Curved Surface Measurement for Robot Vision", pages 370-378 *

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