This article explains issues relating to the use of UTF-8 encoded data in QR-Codes. There are several ways in which data can be stored in a QR-Code, one of which is called Byte Mode. This mode allows data to be encoded in a sequence of 8-bit byte values, in other words an array of integer
Code 39 barcodes should all start and finish with the same pattern that represents the * or asterisk character, however sometimes printers forget to include these characters and the result is a barcode that doesn’t actually fit the Code 39 barcode specification. It is possible to read such barcodes but they do have a significant
Here are some examples of the good, the bad and the ugly of the barcode world. The Good: Code 39 Code 25 Interlaced Code 128 EAN-8 EAN-13 UPC-A UPC-E The Bad and the Ugly: Example 1 – Too many asterisk characters. Example 2 – Extra character returned by toolkit Example 3 – A box around the barcode Example
Example: Code 128 is one of the more complex linear barcodes, with a greater capacity than Code 25 or Code 39, but requiring better quality images for reliable recognition. Key features: 4 different width of bar/space. 3 symbol sets (A, B and C). Symbol set C encodes pairs of digits and is one of the
Example: Code 2 of 5 is a popular barcode for encoding numeric data. Key features: 2 different width of bar/space. Symbol set consists of digits 0-9 Each character is made up of 2 wide and 3 narrow elements. Start sequence is narrow bar, narrow space, narrow bar, narrow space. End sequence is wide bar, narrow
Example: Code 3 of 9 is the most popular barcode for encoding alpha-numeric characters. Key features: 2 different width of bar/space. Symbol set contains 43 characters: A-Z, 0-9, and -, ., *, $, /, +, %, SPACE. Each character is made up of 5 bars and 4 spaces with 3 wide bars/spaces and 6 narrow