Digital Image Correlation: A Method for Object Deformation Analysis

Digital image correlation (DIC) is a computational method employed to determine object deformation. This technique relies on correlation calculations, as illustrated in Figure R2. The initial step involves applying speckle to the image, followed by camera calibration. Subsequently, the image is divided into multiple subregions, enabling the calculation of the correlation between the current image and the original subregion. This process facilitates the determination of subregion deformation, which ultimately provides insights into the overall deformation of the entire image. The correlation calculation method utilized in DIC bears resemblance to template matching.