Damages or missing perfs
Even if the film is torn or some perforation holes are missing the film can still be scanned and usually runs through the gate on the precision roller mechanics, without issue. The missing perforation holes are recognized by the optical perforation detection algorithms and the required sync pulses are continued by an electronic flywheel so that the image scan is continued without interruptions. In may cases the effort of mechanical restoration of a film in poor condition prior to the scan can be reduced or avoided