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MicroPDF417 barcode allows to add metadata [3]: AnnexH to the barcode symbol which can add description of current barcode symbol. However, because MicroPDF417 has restricted amount of capacity it is used rarely. Some structured append fields cannot be omitted and set in case structured append is added to the symbol, some fields are optional.
Then in 1987 it was standardized as JIS-X-0502, [2] a standard physical distribution barcode symbol ITF-14/16/6. The ITF barcode has an add-on version for displaying the weight, etc., and it is possible to encode a 5-digits numerical value and 6-th check character as ITF-6 [ 3 ] after ITF-14 or ITF-16 [ 4 ] (obsolete in 2010).
PDF417 is a stacked barcode that can be read with a simple linear scan being swept over the symbol. [4] Those linear scans need the left and right columns with the start and stop code words. Additionally, the scan needs to know what row it is scanning, so each row of the symbol must also encode its row number.
Symbol Technologies, Inc., was an American manufacturer and supplier of mobile data capture and delivery equipment. The company specialized in barcode scanners , mobile computers , RFID systems and Wireless LAN infrastructure.
A barcode reader or barcode scanner is an optical scanner that can read printed barcodes and send the data they contain to computer. [1] Like a flatbed scanner , it consists of a light source, a lens, and a light sensor for translating optical impulses into electrical signals.
Optimizing the length of the resulting barcode is important when barcode readers are used which must detect the entire barcode image at once in order to read it, such as common laser scanners. The longer the barcode is, the greater distance of laser barcode reader from barcode image is needed, making reading difficult or impossible above some ...