WO1990009561A3 - Tele-imagerie par laser utilisant une geometrie projective - Google Patents
Tele-imagerie par laser utilisant une geometrie projective Download PDFInfo
- 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
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- projective geometry
- imaging system
- range imaging
- electronic
- laser range
- Prior art date
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
- G01B11/2518—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
Landscapes
- 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.
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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-
1989
- 1989-02-17 US US07/312,635 patent/US4979815A/en not_active Expired - Fee Related
-
1990
- 1990-02-06 IL IL93292A patent/IL93292A0/xx unknown
- 1990-02-15 WO PCT/US1990/000832 patent/WO1990009561A2/fr unknown
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EP0160781A1 (fr) * | 1984-04-12 | 1985-11-13 | International Business Machines Corporation | Mesure et détecteur de défauts d'interconnection à circuit imprimé |
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Also Published As
Publication number | Publication date |
---|---|
WO1990009561A2 (fr) | 1990-08-23 |
US4979815A (en) | 1990-12-25 |
IL93292A0 (en) | 1990-11-29 |
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