The numerical simulation code (Jupyter botebook) for evaluating the error of the deformation gradient tensor estimator is in folder "Numerical simulations", and a generated example dataset is also included in the sub-folder. The particle tracking data for all the experiments are in the folder "Experiments". For each experiment, the particle data is packed to a .pkl file and can be openned as a panda dataframe with 4 columns, i.e., ['x', 'y', 'frame', 'particle']. Note that the unit of 'x' and 'y' columns is pixel. For the 3D experiment, an extra column 'z' is included. The DIC data used for comparison with particle tracking is placed in the "Experiments" folder, as a .mat file generated from open-source DIC software NCORR. The DIC parameters and results are included in this file.