Abstract
The quantitative measurement of the positions and diameters of steel reinforcements in buildings is based on the concept of non-linear backprojection (NLBP). Advantages are 3D-image reconstructions from a small number of views, fast numeric algorithms and the consideration of the statistical, spectral and other characteristics of the object. For the radiographic inspection a 60Co source was used and both X-ray films and imaging plates for detection. The imaging plates were combined with special filter screens for contrast optimization. The digitized images from the plates have a high dynamic range and can be read into a computer without a photographic developing process. A numerical preprocessing procedure was developed as space filtering in different directions followed by a combination of the image angle components. A generalized Hough or Radon transformation and a statistical evaluation of the resulting image was employed. The special advantage of this method is the reconstruction of direction-selective structures.
| Original language | English |
|---|---|
| Pages (from-to) | 243-248 |
| Number of pages | 6 |
| Journal | NDT and E International |
| Volume | 30 |
| Issue number | 4 |
| Publication status | Published - Aug 1997 |
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Keywords
- Non-linear backprojection
- Tomography
- Tomosynthesis
ASJC Scopus subject areas
- Engineering(all)
- Mechanical Engineering
Cite this
Cross-sectional imaging of building elements by new non-linear tomosynthesis techniques using imaging plates and 60Co radiation. / Ewert, U.; Baranov, V. A.; Borchardt, K.
In: NDT and E International, Vol. 30, No. 4, 08.1997, p. 243-248.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Cross-sectional imaging of building elements by new non-linear tomosynthesis techniques using imaging plates and 60Co radiation
AU - Ewert, U.
AU - Baranov, V. A.
AU - Borchardt, K.
PY - 1997/8
Y1 - 1997/8
N2 - The quantitative measurement of the positions and diameters of steel reinforcements in buildings is based on the concept of non-linear backprojection (NLBP). Advantages are 3D-image reconstructions from a small number of views, fast numeric algorithms and the consideration of the statistical, spectral and other characteristics of the object. For the radiographic inspection a 60Co source was used and both X-ray films and imaging plates for detection. The imaging plates were combined with special filter screens for contrast optimization. The digitized images from the plates have a high dynamic range and can be read into a computer without a photographic developing process. A numerical preprocessing procedure was developed as space filtering in different directions followed by a combination of the image angle components. A generalized Hough or Radon transformation and a statistical evaluation of the resulting image was employed. The special advantage of this method is the reconstruction of direction-selective structures.
AB - The quantitative measurement of the positions and diameters of steel reinforcements in buildings is based on the concept of non-linear backprojection (NLBP). Advantages are 3D-image reconstructions from a small number of views, fast numeric algorithms and the consideration of the statistical, spectral and other characteristics of the object. For the radiographic inspection a 60Co source was used and both X-ray films and imaging plates for detection. The imaging plates were combined with special filter screens for contrast optimization. The digitized images from the plates have a high dynamic range and can be read into a computer without a photographic developing process. A numerical preprocessing procedure was developed as space filtering in different directions followed by a combination of the image angle components. A generalized Hough or Radon transformation and a statistical evaluation of the resulting image was employed. The special advantage of this method is the reconstruction of direction-selective structures.
KW - Non-linear backprojection
KW - Tomography
KW - Tomosynthesis
UR - http://www.scopus.com/inward/record.url?scp=0031213297&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031213297&partnerID=8YFLogxK
M3 - Article
VL - 30
SP - 243
EP - 248
JO - NDT and E International
JF - NDT and E International
SN - 0963-8695
IS - 4
ER -