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Travail pratique de mesure optique 3D utilisant un montage expérimental simple.

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Title: Travail pratique de mesure optique 3D utilisant un montage expérimental simple.
Alternate Title: Practical work of optical 3D measurement with a simple experimental device.
Authors: Mathieu, Daniel1 daniel.mathieu@uha.fr
Source: Mécanique & Industries. jan/fev2009, Vol. 10 Issue 1, p67-71. 5p. 1 Black and White Photograph, 5 Graphs.
Subjects: Three-dimensional display systems, Imaging systems, Reverse engineering, Computer-aided design
Abstract (English): The geometric reverse engineering is a process for obtaining a CAD model from a pre-existing real object. The measuring process is the initial stage which controls this method. Several successful commercial solutions exist but they are in many cases like "black boxes" for the user. The inherent limitations of the physical principles used are not directly observable. Under practical work of reverse engineering, students are experimenting with 3D measurements of an objet with a simple device. This device consists of a video projector and a digital camera. The tested method is the structured light where patterns are used to do a reflected binary encoding. So it is easy to identify the position of fringes. From the spatial positioning of the experimental device elements and the images, the students have to find out the 3D geometry. For this, they use generic and non-dedicated softwares. This allows them to estimate the experimental and image processing errors. The final step is the integration of digital data in a CAD software where a comparison with a digital model is possible. [ABSTRACT FROM AUTHOR]
Abstract (French): La rétro-conception géométrique est un processus permettant l'obtention dun modèle numérique à partir d'un objet réel préexistant. Le processus de prise de mesures est l'étape initiale conditionnant cette démarche. Plusieurs solutions commerciales performantes existent, mais soot trop souvent des boîtes noires pour l'utilisateur. Les limites inhérentes aux principes physiques utilisés ne sont pas directement perceptibles. Dans le cadre de travaux pratiques de rétro-conception, les étudiants expérimentent la mesure 3D d'un élément de carrosserie avec un montage simple qui se compose d'un vidéoprojecteur et d'un appareil photo numérique. La méthode testée est celle de la lumière structurée avec codage en binaire réfléchi de la position des franges. À partir de la disposition spatiale du dispositif expérimental et des prises de vue, les étudiants doivent analyser le contenu 3D des images à l'aide de logiciels génériques non dédiés. Ceci leur permet d'estimer les sources d'erreurs expérimentales ou de traitement des images. L'étape ultime est l'intégration des données numérisées dans une solution CAO où une comparaison avec un modèle numérique est possible. [ABSTRACT FROM AUTHOR]
Copyright of Mécanique & Industries is the property of EDP Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
FullText Text:
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DbLabel: Engineering Source
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PubType: Academic Journal
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  Label: Title
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  Data: Travail pratique de mesure optique 3D utilisant un montage expérimental simple.
– Name: TitleAlt
  Label: Alternate Title
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  Data: Practical work of optical 3D measurement with a simple experimental device.
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  Data: <searchLink fieldCode="AR" term="%22Mathieu%2C+Daniel%22">Mathieu, Daniel</searchLink><relatesTo>1</relatesTo><i> daniel.mathieu@uha.fr</i>
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  Data: <searchLink fieldCode="JN" term="%22Mécanique+%26+Industries%22">Mécanique & Industries</searchLink>. jan/fev2009, Vol. 10 Issue 1, p67-71. 5p. 1 Black and White Photograph, 5 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Three-dimensional+display+systems%22">Three-dimensional display systems</searchLink><br /><searchLink fieldCode="DE" term="%22Imaging+systems%22">Imaging systems</searchLink><br /><searchLink fieldCode="DE" term="%22Reverse+engineering%22">Reverse engineering</searchLink><br /><searchLink fieldCode="DE" term="%22Computer-aided+design%22">Computer-aided design</searchLink>
– Name: Abstract
  Label: Abstract (English)
  Group: Ab
  Data: The geometric reverse engineering is a process for obtaining a CAD model from a pre-existing real object. The measuring process is the initial stage which controls this method. Several successful commercial solutions exist but they are in many cases like "black boxes" for the user. The inherent limitations of the physical principles used are not directly observable. Under practical work of reverse engineering, students are experimenting with 3D measurements of an objet with a simple device. This device consists of a video projector and a digital camera. The tested method is the structured light where patterns are used to do a reflected binary encoding. So it is easy to identify the position of fringes. From the spatial positioning of the experimental device elements and the images, the students have to find out the 3D geometry. For this, they use generic and non-dedicated softwares. This allows them to estimate the experimental and image processing errors. The final step is the integration of digital data in a CAD software where a comparison with a digital model is possible. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label: Abstract (French)
  Group: Ab
  Data: La rétro-conception géométrique est un processus permettant l'obtention dun modèle numérique à partir d'un objet réel préexistant. Le processus de prise de mesures est l'étape initiale conditionnant cette démarche. Plusieurs solutions commerciales performantes existent, mais soot trop souvent des boîtes noires pour l'utilisateur. Les limites inhérentes aux principes physiques utilisés ne sont pas directement perceptibles. Dans le cadre de travaux pratiques de rétro-conception, les étudiants expérimentent la mesure 3D d'un élément de carrosserie avec un montage simple qui se compose d'un vidéoprojecteur et d'un appareil photo numérique. La méthode testée est celle de la lumière structurée avec codage en binaire réfléchi de la position des franges. À partir de la disposition spatiale du dispositif expérimental et des prises de vue, les étudiants doivent analyser le contenu 3D des images à l'aide de logiciels génériques non dédiés. Ceci leur permet d'estimer les sources d'erreurs expérimentales ou de traitement des images. L'étape ultime est l'intégration des données numérisées dans une solution CAO où une comparaison avec un modèle numérique est possible. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Mécanique & Industries is the property of EDP Sciences and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1051/meca/2009035
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      – Code: fre
        Text: French
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        PageCount: 5
        StartPage: 67
    Subjects:
      – SubjectFull: Three-dimensional display systems
        Type: general
      – SubjectFull: Imaging systems
        Type: general
      – SubjectFull: Reverse engineering
        Type: general
      – SubjectFull: Computer-aided design
        Type: general
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      – TitleFull: Travail pratique de mesure optique 3D utilisant un montage expérimental simple.
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              M: 01
              Text: jan/fev2009
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              Y: 2009
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              Value: 10
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