Barcode
Graphic information in the form of a sequence of lines varying in thickness and (or) rectangular geometric figures. This information is intended to be read by special devices. A barcode may have security features (UV luminescence, magnetic ink, etc.).
Depending on the encoding method, the following types of barcodes are distinguished:
- a linear barcode is encoded and read in one direction;
- a two-dimensional barcode is encoded and read not only horizontally but also vertically.
a
b
c
Fig. 1. Brunei. Passport issued in 2008:
a — page 1. Paper substrate; b — the same. Linear barcode. Letterpress; c — the same. Linear barcode. Reverse side of the print. Oblique light
a
b
Fig. 2. Azerbaijan. Passport issued in 2007:
a — page 4. Paper substrate; b — the same. Two-dimensional barcode. Zoomed fragment. Laser printing