Digital Volume Correlation (DVC) which is the 3D extension of DIC technique allows us to determine the full 3D strain tensor and to analyse 3D mechanical phenomena in the core of materials or structures without hypothesis on the strain kinematic formulation nor using a numerical simulation. Nevertheless, DVC needs volume images which contain a 3D random distribution of grey levels following displacements of material. In this study, we present 3D measurements with images from Xray Micro-Computed Tomography (XμCT) and Optical Scanning Tomography (OST). In order to define the fields of application of both techniques, we show their performances and we evaluate their measurement uncertainty in the cases of rigid body translations and a homogeneous strain test.