Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The picture with the fiducial points used in the experiment. The picture is a (close) copy of a wash drawing by Francesco Guardi (1712–93), a capriccio (imaginary landscape with tower ruins and a fisherman's tent) by Anne-Sophie Bonno (http://www.atelier-bonno.fr/galerie-copies-arts-graphiques.html). Scales are in pixels.
