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  4. The Duality of Ray-Based and Pinhole-Camera Modeling and 3D Measurement Improvements Using the Ray-Based Model
 
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2022
Journal Article
Titel

The Duality of Ray-Based and Pinhole-Camera Modeling and 3D Measurement Improvements Using the Ray-Based Model

Abstract
Geometrical camera modeling is the precondition for 3D-reconstruction tasks using photogrammetric sensor systems. The purpose of this study is to describe an approach for possible accuracy improvements by using the ray-based-camera model. The relations between the common pinhole and the generally valid ray-based-camera model are shown. A new approach to the implementation and calibration of the ray-based-camera model is introduced. Using a simple laboratory setup consisting of two cameras and a projector, experimental measurements were performed. The experiments and results showed the possibility of easily transforming the common pinhole model into a ray-based model and of performing calibration using the ray-based model. These initial results show the model’s potential for considerable accuracy improvements, especially for sensor systems using wide-angle lenses or with deep 3D measurements. This study presents several approaches for further improvements to and the practical usage of high-precision optical 3D measurements.
Author(s)
Bräuer-Burchardt, Christian
Fraunhofer-Institut für Angewandte Optik und Feinmechanik IOF
Ramm, Roland
Fraunhofer-Institut für Angewandte Optik und Feinmechanik IOF
Kühmstedt, Peter
Fraunhofer-Institut für Angewandte Optik und Feinmechanik IOF
Notni, Gunther
Fraunhofer-Institut für Angewandte Optik und Feinmechanik IOF
Zeitschrift
Sensors. Online journal
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DOI
10.3390/s22197540
Language
English
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Fraunhofer-Institut für Angewandte Optik und Feinmechanik IOF
Tags
  • 3D measurements

  • camera calibration

  • camera modeling

  • error analysis

  • machine vision

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