Entrance permit control

A system for monitoring an entrance region including an entrance to a restricted area, said system comprising:

• a computer vision sub-system configured to receive a stream of digital images representing at least one view of the entrance region, the computer vision sub-system being configured to process the received stream of digital images for detection of a machine-readable code displayable on a medium carried by an individual in the entrance region and perform, based on the received stream of digital images, a location tracking of the machine-readable code within the entrance region;
• a validation sub-system configured to initiate a validation of the machine-readable code detected by the computer vision sub-system;
• and
• a feedback sub-system configured to, in dependence of the validation and position data generated by the location tracking, provide a visual indication of a result of the validation on at least one of the medium and the individual carrying the medium.