• Acta Optica Sinica
  • Vol. 44, Issue 3, 0310001 (2024)
Bing Pan1,*, Xuanhao Zhang1, and Long Wang2
Author Affiliations
  • 1National Key Laboratory of Strength and Structural Integrity, School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China
  • 2Science and Technology on Reliability and Environmental Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing 100076, China
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    DOI: 10.3788/AOS230987 Cite this Article Set citation alerts
    Bing Pan, Xuanhao Zhang, Long Wang. Study on Gray Level Residual Field Calculation in Digital Volume Correlation[J]. Acta Optica Sinica, 2024, 44(3): 0310001 Copy Citation Text show less
    Bisic principle of DVC
    Fig. 1. Bisic principle of DVC
    Schematic diagram of the gray level residual field calculation process
    Fig. 2. Schematic diagram of the gray level residual field calculation process
    Schematic diagram of data interpolation based on 3D Delaunay triangulation algorithm
    Fig. 3. Schematic diagram of data interpolation based on 3D Delaunay triangulation algorithm
    Schematic illustration of the implementation of tricubic interpolation (k can be -1, 0, 1, 2)
    Fig. 4. Schematic illustration of the implementation of tricubic interpolation (k can be -1, 0, 1, 2)
    Simulated volume images of 200 voxel×200 voxel×200 voxel. (a) Reference volume image; (b) deformed volume image; (c) differential image between reference and deformed volume images
    Fig. 5. Simulated volume images of 200 voxel×200 voxel×200 voxel. (a) Reference volume image; (b) deformed volume image; (c) differential image between reference and deformed volume images
    Measurement results by local DVC in simulation experiment. (a) v displacement field; (b) ZNCC coefficient field; (c) von-mises strain field
    Fig. 6. Measurement results by local DVC in simulation experiment. (a) v displacement field; (b) ZNCC coefficient field; (c) von-mises strain field
    Gray level residual fields and grayscale histogram. (a) Uncorrected; (b) corrected; (c) threshold processed; (d) grayscale histogram
    Fig. 7. Gray level residual fields and grayscale histogram. (a) Uncorrected; (b) corrected; (c) threshold processed; (d) grayscale histogram
    Real test results. (a) Reference volume image; (b) deformed volume image; (c) differential image between the two volume images
    Fig. 8. Real test results. (a) Reference volume image; (b) deformed volume image; (c) differential image between the two volume images
    Results obtained by local DVC in real test. (a) ZNCC coefficient field; (b) von-mises strain field; (c) gray level residual field
    Fig. 9. Results obtained by local DVC in real test. (a) ZNCC coefficient field; (b) von-mises strain field; (c) gray level residual field
    Slice maps of different positions of residual gray field and 3D view of the damage location within the nodular graphite cast iron volume image. (a) y=40 voxel slice map; (b) y=85 voxel slice map (the left is the original slice map, and the right is the post-processing slice map); (c) 3D view (the damage region is blue and the nodular graphite is dark)
    Fig. 10. Slice maps of different positions of residual gray field and 3D view of the damage location within the nodular graphite cast iron volume image. (a) y=40 voxel slice map; (b) y=85 voxel slice map (the left is the original slice map, and the right is the post-processing slice map); (c) 3D view (the damage region is blue and the nodular graphite is dark)