This study aimed to compare accuracy and precision errors of three Digital Volume Correlation (DVC) approaches in a particular 3D zero-strain condition for both trabecular and cortical bone specimens, imaged repeatedly using micro-CT. Both scalar average errors and errors affecting the individual components of displacements and strains were calculated. For each DVC approach, errors decreased asymptotically for larger sub-volume sizes in the range explored. Considering this particular set of images, the global approach (ShIRT-FE) showed an overall better accuracy and precision than the local ones (DaVis). The latter show reasonable results for large nodal spacing, particularly for trabecular bone.
- Digital volume correlation
- zero-strain test