The Grid Method (GM)

The grid method is an alternative to Digital Image Correlation (DIC) that uses a regular marking (a grid) as opposed to a random pattern. This enables the use of spatial phase-shifting algorithms to extract displacement fields. As a consequence, the spatial resolution is superior to DIC (typically, one independent displacement data point for a 5×5 pixel subset) for roughly the same displacement resolution.

grid

Example of a grid

Some resources