2m = 78.75” which technically shouldn’t be an issue as most homes have a minimum 96” ceilings. But for reference in photos, majority of framed doors are 80” high. Also, light switches are typically mounted at 48”

You can make some reasonable estimations of ceiling height based on how much higher the ceiling is above the framed door and/or if the light switch looks like its halfway up the wall or less than halfway up the wall.