Digital Image Correlation (DIC) is a full-field image analysis method, based on grey value digital images, that can determine the contour and the displacements of an object under load. DIC is very effective at mapping deformation in macroscopic mechanical testing, where the application of a speckle pattern provides the needed contrast to correlate images.
Stereo DIC is suitable for measuring deformation and movement in a surface that is irregular, has any movement that is not planar or similar deformities. If all movement happens in one plane, DIC 2D works well. For other cases where for example a plate is bending, tire is compressed, helmet or another round object is impacted, it is a case that is well suited for Stereo DIC.