Real inline X-ray 3D CT with short cycle times for light metal casting inspection in production

Author

Oeckl, Steven ; Wenzel, Thomas ; Gondrom, Sven ; Rauch, Franz

Author_Institution

Fraunhofer Development Center X-Ray Technology, a cooperative department of the Fraunhofer Institutes IZFP Saarbruecken and IIS Erlangen, Germany

fYear

2008

fDate

19-25 Oct. 2008

Firstpage

562

Lastpage

564

Abstract

This paper presents the fusion of X-ray computerized tomography reconstruction and image processing to realize an inline casting inspection system. The approximative inverse is used to derive a nonseparable multiresolution inversion formula in 3D Feldkamp-type cone-beam tomography, i.e. an inversion formula for reconstructing the wavelet approximation and wavelet detail coefficients of the volume slice by slice. The algorithm supports progressive reconstruction and local tomography for recovering only the regions of interest inside the investigated volume. These regions are determined by an image processing step during reconstruction. The features of the reconstruction algorithm are shown by means of simulated data as well as measured data of an aluminium casting from automobile industry.

Keywords

Aluminum; Automobiles; Casting; Computed tomography; Image processing; Image reconstruction; Inspection; Production; Reconstruction algorithms; X-ray imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2008. NSS '08. IEEE

Conference_Location

Dresden, Germany

ISSN

1095-7863

Print_ISBN

978-1-4244-2714-7

Electronic_ISBN

1095-7863

Type

conf

DOI

10.1109/NSSMIC.2008.4775235

Filename

4775235