Digital Image Correlation
Digital Image Correlation is an optical remote sensing technique allowing the measurement of displacements through the correlation of co-registered photograms collected in different time intervals by a high resolution digital camera.
The operational principle is based on the analysis of color changes in single pixels (or groups of pixel), thus allowing the measurement of surface deformations of the ground (landslides, volcanoes, subsidence etc.) or of structures without any additional installation of in-contact sensors or reflectors.
Experimental applications confirmed, through integration with other remote sensing techniques, the high reliability of the technique both in natural hazards structural fields.