- A barcode is machine readable representation of data.
- The data usually describes something about the object that carries the barcode.
- Barcodes consists of data which varies in widths and spaces of parallel lines and they are called linear or one dimensional(1D).
- Two dimensional(2D) codes were developed, using rectangles, dots, hexagons and other geometric patterns in two dimensions, usually called barcodes
- Barcodes originally were scanned by special optical scanners called barcode readers.
- Now applications software became available for devices that could read images, such as smartphones with cameras.
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