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# bar coding

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• Barcodes can be used to input data into computer and other electronic devces.it is also used to keep the count of goods and commodities a business has. they are used to advertise once scanned it will redirect you to link where information is displayed.
• Bar code readers cannot read labels that are wrinkled, dirty or smudged.Businesses which still do not use bar codes may avoid doing so because of the high cost for new equipment.Dot matrix and ink jet printers cannot print high-quality bar codes.Clothing, jewelry and other merchandise have bar code labels attached to them by plastic or string tags. These tags can be switched by shoplifters, lost, mangled or made otherwise unreadable.
• Barcode scanners virtually always use an almost monochromatic light source at the red end of the spectrum.
• ### bar coding

1. 1. Barcodes and barcode scanners Ayo ogunwuyi
2. 2. What are barcodesBarcodes are simply information on a product disguised incode spaces used to identify products in stores . The linesin a bar code represent numbers and letters which, whenread by a bar code scanner, can be decoded, recorded andprocessed by a computer system
3. 3. • 0 = 3211 1 = 2221 2 = 2122 3 = 1411 4 = 1132 5 = 1231 6 = 1114 7 = 1312 8 = 1213 9 = 3112• Each digit is coded by two black and two white stripes. The stripes have widths of from 1 to 4 units, and the total width for each digit is always seven units.• Some digits of the barcode are reversed, so that they read right to left. Part of the code has black and white inverted, so black stripes are white and vice versa. This helps cut down errors and allows a computer to work out if the code was read from the wrong end when it was scanned.
4. 4. • Linear barcodes-are created by translating the supported characters that should be displayed into combination of narrow and wide bars which are combined into a barcode.• Matrix (2D) barcodes-is a two-dimensional way to represent information. It is similar to a linear (1-dimensional) barcode, but can represent more data per unit area.
5. 5. Of Barcodes Some examples include:Linear barcodes 2D barcodesCode 128 Barcode types and use Data MatrixUPC PDF417Interleaved 2 of 5 Maxi codeData Matrix is used for automotive item identificationUPC/EAN is used for Items for sale worldwideMaxi code is used for US Department of defenseCode 128 is used for Shipping cartons
6. 6. • Barcodes can be read by shining a light across the stripes or by scanning the stripes like they do in grocery stores. A video image is captured and measures the lengths of the white spaces and black bars. They are then analyzed and data are decoded, stored and processed.
7. 7. ••••
8. 8. •Time/Accuracy of data input.• Speed of entering data into your computersystem.• Timeliness of information for moreeffective management of resources,inventories, etc.• Labor savings realized through eliminationof manual systems.
9. 9. • Damaged Labels• Upfront Cost• Printer Requirements• Odd Shaped Merchandise
10. 10. Barcodes: Color & Contrast Good
11. 11. Barcodes: Color & Contrast Bad
12. 12. Bibliographyhttp://www.slideshare.net/MaxineHorn/creativ e-barcode-presentation-2011http://www.activebarcode.com/howto/powerp oint2010.htmlhttp://www.barcodeman.com/info/color_bc.ph p