Security documents are encoded to convey machine-readable multi-bit binary information, usually in a manner not alerting human viewers that such information is present. In addition, the image processing method improves the raw images of the sensor using image-sharpening methods andor contrast-enhancing methods, so that display on a display arrangement is made possible for viewing by a viewer. Herein, the carrying member is provided in the process unit and the loadlock unit, and the loadingunloading unit, the loadlock unit, and the process unit are sequentially disposed. The three raised portions are traversable by the passenger vehicle. Also, the insertion edge is configured to be inserted into a receptacle, the second contact array being positioned relative to the insertion edge so as to mate with a corresponding contact array in the receptacle when the insertion edge is inserted into the receptacle. The target block of data is marked as read from the source storage.