Augmented Lagrangian Digital Image Correlation (2D_ALDIC)

Quadtree mesh ALDIC codes are added to solve complex geometry.

Augmented Lagrangian Digital Image Correlation (2D_ALDIC)

The latest release before the quadtree mesh files (main_ALDIC_Quadtree.m & main_ALDIC_QuadtreeHole.m) added.

Augmented Lagrangian Digital Image Correlation (2D_ALDIC)

AL-DIC(Augmented Lagrangian DIC) is a fast, parallel-computing hybrid DIC algorithm, which combines advantages of local subset DIC method (fast computation speed, and parallel computing) and finite-element-based global DIC method (guarantee global kinematic compatibility and decrease noise).

Advantages of AL-DIC algorithm
[1] It’s a fast algorithm using distributed parallel computing.
[2] Global kinematic compatibility is added as a global constraint in the form of augmented Lagrangian, and solved using Alternating Direction Method of Multipliers scheme.
[3] Both displacement fields and affine deformation gradients are correlated at the same time.
[4] No need of much manual experience about choosing displacement smoothing filters.
[5] It works well with compressed DIC images and adaptive mesh. See our paper: Yang, J. & Bhattacharya, K. Exp Mech (2019). https://doi.org/10.1007/s11340-018-00459-y;
[6] Both accumulative and incremental DIC modes are implemented to deal with image sequences, which is especially quite useful for very large deformations.

Prerequisites & Installation
AL-DIC MATLAB code was tested on MATLAB versions later than R2018a. Both single thread and parallel computing features are included in AL-DIC code. Please download and unzip the code to the MATLAB working path. Then, execute the mail file main_ALDIC.m.