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Trinocular stereo system with object space oriented correlation for inner pipe inspection

Haertel, Maryah Elisa Morastoni ; da Costa Pinto, Tiago Loureiro Figaro ; Gonçalves Júnior, Armando Albertazzi

Measurement : journal of the International Measurement Confederation, 2015-09, Vol.73, p.162-170 [Periódico revisado por pares]

Elsevier Ltd

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  • Título:
    Trinocular stereo system with object space oriented correlation for inner pipe inspection
  • Autor: Haertel, Maryah Elisa Morastoni ; da Costa Pinto, Tiago Loureiro Figaro ; Gonçalves Júnior, Armando Albertazzi
  • Assuntos: Correlation ; Inspection ; Point cloud ; Texture ; Trinocular
  • É parte de: Measurement : journal of the International Measurement Confederation, 2015-09, Vol.73, p.162-170
  • Descrição: •Trinocular stereo vision for inner geometry pipe inspection.•Cameras symmetrically positioned with respect to the pipe axis for better sensitivity distribution.•Object space oriented point selection for correlation.•Point cloud intrinsically organized in a regular mesh using a cylindrical coordinate system. Geometric inspection of pipes is a fundamental task in the oil industry. This work shows the development of a system to measure the geometry of a pipe’s inner wall using a trinocular stereo system. Natural pipe texture is used to produce a point cloud intrinsically organized in a regular mesh in a cylindrical coordinate system. The main novelty in the proposed algorithm is the definition of a regular kernel in object space, which is mathematically projected to each image plane using the inverse triangulation approach. The use of a triple correlation coefficient estimator led to simultaneous detection of homologous points. Experiments depict measurements of pipes with real and simulated textures, and results on a calibrated pipe of approximately 150mm in diameter showed a mean error of 0.3mm with a standard deviation of 0.2mm.
  • Editor: Elsevier Ltd
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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