Take measurements from photos
Photo geometry is a common process used by investigators who are supplied with photographs of an accident scene, but no measurements. By establishing a mathematical matrix or relationship between numbers of known points in the photograph with points in the real scene, measurements can be extracted. The use of digital cameras has greatly enhanced the process of Photo geometry.
Photo geometry is often applied to the process of crash reconstruction in cases where photographs were taken, but measurements were not.
Many times the only evidence that exists after a collision has been cleaned up are photographs. These photographs can come from police, bystanders, news agencies and insurance adjusters. In many instances dimensional information can be derived from these photographs to provide greater detail for the collision reconstruction.