Barcode card can be recognized by optical scanners called barcode readers or scanned from an image by special software. In fact, the barcode is a group of of printed parallel lines, the widths and spacing of the lines represent readable different data and information. There are many types of barcodes available, such as EAN-13, EAN-8, EAN-128, Code 39, Code 25, UPC-A code, UPC-E code and so on.