Articles by Carlo Alberto Birocco

The present technique of digital image processing follows the concept of analytical rectification, allowing for the elimination of the geometric distortions from the original image and the retrieval of the correct dimensional information. The image can be produced in various ways: most often, sampling is done with a scanner, but recently a new method is becoming more frequently used, that is the acquisition of digital images directly on ground by means of digital cameras with a CCD image sensor. The processing software is now offered by various producers of photogrammetric equipment, which allows us to carry out surveys of manufactured flat items, starting from a single image, to create a vector graphics superimposed in CAD environment.