Barcodes, Linear barcodes
Collective term for barcodes, bar codes or bar codes with an optically-electronically readable print image consisting of parallel bars of different widths at different distances from each other. The code refers to the representation of the data information in binary symbols. Barcodes can be captured with reading devices (cameras, scanners) and processed electronically.
The barcodes are divided into three main categories:
- Linear barcodes consist of a line with bars and spaces.
- Stacked barcodes consist of several lines with bars and spaces. They usually have a common start and stop sign.
Examples of stacked barcodes are PDF 417, Supercode, Code 49, Codablock, Code 16K and Micro PDF. - Composite symbologies consist of several components, whereby the linear part also serves as an orientation symbol (e.g. EAN, Code 128 or 2/5 Interleaved). The symbol is supplemented by a 2D component. The background to the development is the desire to encode additional information on storage location, best before date, batch number and other information while retaining the linear symbology (article number).
See also 2D or matrix codes.
The simplest and best lighting is generally achieved with ring lighting.
