SCIENTIFIC, PHOTOGRAPHIC, OPTICAL APPARATUS AND INSTRUMENTS, MEASURING, CINEMATOGRAPHIC, SIGNALING, AND SUPERVISING APPARATUS AND INSTRUMENTS, PARTICULARLY SYSTEMS FOR MEASURING AND DETERMINING THE POSITION, THE ORIENTATION AND/OR THE MOVEMENT OF OBJECTS, PERSONS OR ANIMALS, COMPRISING DIGITAL CAMERAS, CALCULATING UNITS, DATA PROCESSING AND TRANSMISSION EQUIPMENT, MARKERS, UNITS FOR SYNCHRONIZATION AND TOOLS FOR CALIBRATION, AND COMPONENTS OF SUCH SYSTEMS, NAMELY, DIGITAL CAMERAS, CALCULATING...