A method, system and computer-readable medium for achieving a target compression ratio for binary images with a minimum of image degradation. The accommodating buffer layer is a layer of monocrystalline oxide spaced apart from the silicon wafer by an amorphous interface layer of silicon oxide. The sensitive element consists of a layer of a semiconductor molecular material M1 having a conductivity C1 and a layer of a semiconductor molecular material M2 having a conductivity C2 and a forbidden bandwidth Eg2<1 eV. The divider separates the case into an upper compartment and a lower compartment. Preferably, the apparatus further includes a latching device to permit latching of the jacking member in both the stored position and the jacked position. The electrical signals are then evaluated with an evaluating device, wherein the movement of a seat belt webbing influenced by the body of the belted-in vehicle occupant is scanned and a corresponding signal is fed to the evaluating device.