Object Pose Estimation Using a Set of Local Radiographs of a Part and Its CAD Model

Koenig, Anne; Glière, Alain; Rizo, P.; Bell, Benjamin; Paul, Babu Sena; Anderson, J. Keith

doi:10.1007/978-1-4615-5947-4_108

Cited by 2 publications

(1 citation statement)

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“…The expected improvement must now be confirmed on real data. Finally, a slightly different version of the three dimensional solution program performs the simulation task in the RADICAD European project [12] whose aim is to use a few radiographs and the CAD model of a mechanical part to detect and characterize flaws. One of the test parts is made of aluminum alloy in which a hole has been driI1ed and a copper wire inserted.…”

Section: Applicationsmentioning

confidence: 99%

Sindbad: From CAD Model to Synthetic Radiographs

Glière

1998

Review of Progress in Quantitative Nondestructive Evaluation

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INTRODUCTIONX-ray simulation tools are of primary interest during the design stage of radiographic facilities where they can help to choose the device parameters (X-ray tube settings such as voltage and filtration, detector type and thickness, geometry of the bench, etc.) and predict performances of the future device. They can also be helpful, in the evaluation and test of radiation image processing techniques (tomography, tomosynthesis, etc.) and in radiographic non destructive evaluation processes using synthetic images as, for instance, flaw detection, evaluation of object inspectability, assistance to inspection interpretation, inspector training, etc.The most important part of the simulation deals with interaction of radiation with matter in the examined part or in the detector. This interaction is fully described by the Boltzman transport equation. However, the solution of this equation, usually obtained by a Monte Carlo method is too computer time consuming to be of practical use in the case of complex part geometry. If scattering and internal sources are neglected, an integral solution, the exponential attenuation law, allows to compute the direct flux. This analytical model can be implemented as a possible simplified alternative to the full solution. Several models, more or less sophisticated, are then available to simulate scattered radiation, which can then be added to the direct flux.This analytical approach has been adopted by several research teams. The German Federal Institute for Materials Research and Testing (BAM) has developed a simulation tool [1] which was later improved by a coupling to a CAD interface. The Italian National Agency for New Technology, Energy and the Environment (ENEA) has included an X-ray simulation in their digital imaging software in order to help design an inspection scenario and assist the operator while detecting flaws [2]. The Center for Non-Destructive Evaluation (CNDE, USA) has built in several stages a sophisticated simulation package XRSIM, which includes an X-ray source model, a CAD description of the inspected object, a scattering model and several kinds of radiation detector models [3][4].The LETI laboratory (Laboratoire d'Electronique et de Techniques d'Instrumentation, France), is involved in the design of high performance radiographic or

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Section: Applicationsmentioning

confidence: 99%