Digital Image Correlation, often referred to as DIC, is a 2D or 3D optical tracking technique used to measure deformation, vibration and strain in materials. DIC tracks a gray value pattern in subsets through digital imaging. You will often see this speckled pattern on objects such as aluminum, rubber, glass, and plastics. This technique is used for a variety of tests including torsion, tinsel, bending, or load testing. DIC can be used on very small or large testing areas.