The diagram illustrates the mechanism of a self-operated photo box.
Overall, the machines consist of two main areas: an external interface for selecting options and making payment, and an internal space where users sit and follow on-screen instructions to take photos independently without the assistance of another person.
Externally, the booth is equipped with a control panel which includes a coin slot and buttons that allow customers choose their favourite types of photos: one large format or 4 passport-sized photos. It also offers a choice between monochrome or multi-color prints, with colour being required for passport.
Internally, the booth contains a mirror which is in front of a adjustable stool, helping customers position their eyes at the correct level. Before taking photos, the curtain should be completely closed to ensure the camera functions effectively and prevent light interference. Then, holding eye level to wait for a light signal which flashes after a 3-second countdown. Finally, the photo will be ready for 1 minute outside the booth.
