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How Barcode Scanners Work

How Barcode Scanners Work What are barcodes used for? tracking products, prices, and stock levels for centralized recording on a computer system changing prices as often as you like, without having to put new price tags on all your products knowing instantly when stock levels of certain items are running low and it is time to reorder A barcode-based stock system has 3 main partS central computer • runs a database of the maker, cost and quantity of all the products being sold barcodes checkout scanners • printed on all the products • that can read the barcodes How do barcodes represent the numbers 0-9? • each digit in the product number is given the same horizontal space of exactly 7 units • the 7 units are colored with a different pattern of black and white stripes • e.g., number one is represented by 2 white stripes, 2 black stripes, 2 white stripes, and 1 black stripe 8. • number two is represented by 2 white stripes, 1 black stripe, 2 white stripes, and 2 black stripes 9. > How do barcode scanners work? Pen-type Reader • consists of a light source and a photodiode on the tip of the pen Laser Scanner • photodiode releases a waveform t measure the widths of bars and the • works similar to a Pen-type Reader space between the bar codes • the waveform is decoded by the barcode scanners to get data about the product • only difference is a laser beam instead of the light Source, and a rotating prism for scanning CCD Reader Camera-based Reader • has several light sensors • installed with camera and image processing techniques in the reading of barcodes • basic difference between a CCD Reader and a Pen-type Reader is that the CCD Reader measures the released ambient light, while a Pen-type Reader and a Laser Reader measures the light that is reflected from the scanner II • considered to be more efficient than other Barcode Scanners or Readers Omni-Directional Barcode Scanner • highly advanced and very efficient in decoding the badly printed, crumpled, and even torn barcodes on the product • used for various applications such as retailing and industrial scanning, where the main difference is about the reading distance of the barcode and the volume of work Other Facts • barcodes are read by specialized barcode scanners, which use an optical sensor that translates the black bars into an electronic code and sends it to a computer • many of the scanners use lasers, while others use camera lenses • scanners have even been implemented in cell phones, which allow users to take a photo of a barcode and the image is then sent toa database that translates the code Types of Barcodes Linear Barcode • large in size, but only has 1 piece of information: an identifying number used by computers to find a product 607014057011 2D Barcode • also known as matrix code • includes more information in the code, including price and quantity. Sources: Wasp http://www.explainthatstuff.com/barcodescanners.html http://cdn4.explainthatstuff.com/barcodestripes.gif http://www.facts-and-figures.org/Barcode-Scanner-and-Readers.html http://www.ehow.com/list_6629108_barcodes.html BARCODE TECHNOLOGIES each digit is represented by 7 equal-sized black or white vertical blocks each block has been designedoumber even accurately represents the: when it is upside down in a way that it to How Barcode Scanners Work What are barcodes used for? tracking products, prices, and stock levels for centralized recording on a computer system changing prices as often as you like, without having to put new price tags on all your products knowing instantly when stock levels of certain items are running low and it is time to reorder A barcode-based stock system has 3 main partS central computer • runs a database of the maker, cost and quantity of all the products being sold barcodes checkout scanners • printed on all the products • that can read the barcodes How do barcodes represent the numbers 0-9? • each digit in the product number is given the same horizontal space of exactly 7 units • the 7 units are colored with a different pattern of black and white stripes • e.g., number one is represented by 2 white stripes, 2 black stripes, 2 white stripes, and 1 black stripe 8. • number two is represented by 2 white stripes, 1 black stripe, 2 white stripes, and 2 black stripes 9. > How do barcode scanners work? Pen-type Reader • consists of a light source and a photodiode on the tip of the pen Laser Scanner • photodiode releases a waveform t measure the widths of bars and the • works similar to a Pen-type Reader space between the bar codes • the waveform is decoded by the barcode scanners to get data about the product • only difference is a laser beam instead of the light Source, and a rotating prism for scanning CCD Reader Camera-based Reader • has several light sensors • installed with camera and image processing techniques in the reading of barcodes • basic difference between a CCD Reader and a Pen-type Reader is that the CCD Reader measures the released ambient light, while a Pen-type Reader and a Laser Reader measures the light that is reflected from the scanner II • considered to be more efficient than other Barcode Scanners or Readers Omni-Directional Barcode Scanner • highly advanced and very efficient in decoding the badly printed, crumpled, and even torn barcodes on the product • used for various applications such as retailing and industrial scanning, where the main difference is about the reading distance of the barcode and the volume of work Other Facts • barcodes are read by specialized barcode scanners, which use an optical sensor that translates the black bars into an electronic code and sends it to a computer • many of the scanners use lasers, while others use camera lenses • scanners have even been implemented in cell phones, which allow users to take a photo of a barcode and the image is then sent toa database that translates the code Types of Barcodes Linear Barcode • large in size, but only has 1 piece of information: an identifying number used by computers to find a product 607014057011 2D Barcode • also known as matrix code • includes more information in the code, including price and quantity. Sources: Wasp http://www.explainthatstuff.com/barcodescanners.html http://cdn4.explainthatstuff.com/barcodestripes.gif http://www.facts-and-figures.org/Barcode-Scanner-and-Readers.html http://www.ehow.com/list_6629108_barcodes.html BARCODE TECHNOLOGIES each digit is represented by 7 equal-sized black or white vertical blocks each block has been designedoumber even accurately represents the: when it is upside down in a way that it to How Barcode Scanners Work What are barcodes used for? tracking products, prices, and stock levels for centralized recording on a computer system changing prices as often as you like, without having to put new price tags on all your products knowing instantly when stock levels of certain items are running low and it is time to reorder A barcode-based stock system has 3 main partS central computer • runs a database of the maker, cost and quantity of all the products being sold barcodes checkout scanners • printed on all the products • that can read the barcodes How do barcodes represent the numbers 0-9? • each digit in the product number is given the same horizontal space of exactly 7 units • the 7 units are colored with a different pattern of black and white stripes • e.g., number one is represented by 2 white stripes, 2 black stripes, 2 white stripes, and 1 black stripe 8. • number two is represented by 2 white stripes, 1 black stripe, 2 white stripes, and 2 black stripes 9. > How do barcode scanners work? Pen-type Reader • consists of a light source and a photodiode on the tip of the pen Laser Scanner • photodiode releases a waveform t measure the widths of bars and the • works similar to a Pen-type Reader space between the bar codes • the waveform is decoded by the barcode scanners to get data about the product • only difference is a laser beam instead of the light Source, and a rotating prism for scanning CCD Reader Camera-based Reader • has several light sensors • installed with camera and image processing techniques in the reading of barcodes • basic difference between a CCD Reader and a Pen-type Reader is that the CCD Reader measures the released ambient light, while a Pen-type Reader and a Laser Reader measures the light that is reflected from the scanner II • considered to be more efficient than other Barcode Scanners or Readers Omni-Directional Barcode Scanner • highly advanced and very efficient in decoding the badly printed, crumpled, and even torn barcodes on the product • used for various applications such as retailing and industrial scanning, where the main difference is about the reading distance of the barcode and the volume of work Other Facts • barcodes are read by specialized barcode scanners, which use an optical sensor that translates the black bars into an electronic code and sends it to a computer • many of the scanners use lasers, while others use camera lenses • scanners have even been implemented in cell phones, which allow users to take a photo of a barcode and the image is then sent toa database that translates the code Types of Barcodes Linear Barcode • large in size, but only has 1 piece of information: an identifying number used by computers to find a product 607014057011 2D Barcode • also known as matrix code • includes more information in the code, including price and quantity. Sources: Wasp http://www.explainthatstuff.com/barcodescanners.html http://cdn4.explainthatstuff.com/barcodestripes.gif http://www.facts-and-figures.org/Barcode-Scanner-and-Readers.html http://www.ehow.com/list_6629108_barcodes.html BARCODE TECHNOLOGIES each digit is represented by 7 equal-sized black or white vertical blocks each block has been designedoumber even accurately represents the: when it is upside down in a way that it to How Barcode Scanners Work What are barcodes used for? tracking products, prices, and stock levels for centralized recording on a computer system changing prices as often as you like, without having to put new price tags on all your products knowing instantly when stock levels of certain items are running low and it is time to reorder A barcode-based stock system has 3 main partS central computer • runs a database of the maker, cost and quantity of all the products being sold barcodes checkout scanners • printed on all the products • that can read the barcodes How do barcodes represent the numbers 0-9? • each digit in the product number is given the same horizontal space of exactly 7 units • the 7 units are colored with a different pattern of black and white stripes • e.g., number one is represented by 2 white stripes, 2 black stripes, 2 white stripes, and 1 black stripe 8. • number two is represented by 2 white stripes, 1 black stripe, 2 white stripes, and 2 black stripes 9. > How do barcode scanners work? Pen-type Reader • consists of a light source and a photodiode on the tip of the pen Laser Scanner • photodiode releases a waveform t measure the widths of bars and the • works similar to a Pen-type Reader space between the bar codes • the waveform is decoded by the barcode scanners to get data about the product • only difference is a laser beam instead of the light Source, and a rotating prism for scanning CCD Reader Camera-based Reader • has several light sensors • installed with camera and image processing techniques in the reading of barcodes • basic difference between a CCD Reader and a Pen-type Reader is that the CCD Reader measures the released ambient light, while a Pen-type Reader and a Laser Reader measures the light that is reflected from the scanner II • considered to be more efficient than other Barcode Scanners or Readers Omni-Directional Barcode Scanner • highly advanced and very efficient in decoding the badly printed, crumpled, and even torn barcodes on the product • used for various applications such as retailing and industrial scanning, where the main difference is about the reading distance of the barcode and the volume of work Other Facts • barcodes are read by specialized barcode scanners, which use an optical sensor that translates the black bars into an electronic code and sends it to a computer • many of the scanners use lasers, while others use camera lenses • scanners have even been implemented in cell phones, which allow users to take a photo of a barcode and the image is then sent toa database that translates the code Types of Barcodes Linear Barcode • large in size, but only has 1 piece of information: an identifying number used by computers to find a product 607014057011 2D Barcode • also known as matrix code • includes more information in the code, including price and quantity. Sources: Wasp http://www.explainthatstuff.com/barcodescanners.html http://cdn4.explainthatstuff.com/barcodestripes.gif http://www.facts-and-figures.org/Barcode-Scanner-and-Readers.html http://www.ehow.com/list_6629108_barcodes.html BARCODE TECHNOLOGIES each digit is represented by 7 equal-sized black or white vertical blocks each block has been designedoumber even accurately represents the: when it is upside down in a way that it to How Barcode Scanners Work What are barcodes used for? tracking products, prices, and stock levels for centralized recording on a computer system changing prices as often as you like, without having to put new price tags on all your products knowing instantly when stock levels of certain items are running low and it is time to reorder A barcode-based stock system has 3 main partS central computer • runs a database of the maker, cost and quantity of all the products being sold barcodes checkout scanners • printed on all the products • that can read the barcodes How do barcodes represent the numbers 0-9? • each digit in the product number is given the same horizontal space of exactly 7 units • the 7 units are colored with a different pattern of black and white stripes • e.g., number one is represented by 2 white stripes, 2 black stripes, 2 white stripes, and 1 black stripe 8. • number two is represented by 2 white stripes, 1 black stripe, 2 white stripes, and 2 black stripes 9. > How do barcode scanners work? Pen-type Reader • consists of a light source and a photodiode on the tip of the pen Laser Scanner • photodiode releases a waveform t measure the widths of bars and the • works similar to a Pen-type Reader space between the bar codes • the waveform is decoded by the barcode scanners to get data about the product • only difference is a laser beam instead of the light Source, and a rotating prism for scanning CCD Reader Camera-based Reader • has several light sensors • installed with camera and image processing techniques in the reading of barcodes • basic difference between a CCD Reader and a Pen-type Reader is that the CCD Reader measures the released ambient light, while a Pen-type Reader and a Laser Reader measures the light that is reflected from the scanner II • considered to be more efficient than other Barcode Scanners or Readers Omni-Directional Barcode Scanner • highly advanced and very efficient in decoding the badly printed, crumpled, and even torn barcodes on the product • used for various applications such as retailing and industrial scanning, where the main difference is about the reading distance of the barcode and the volume of work Other Facts • barcodes are read by specialized barcode scanners, which use an optical sensor that translates the black bars into an electronic code and sends it to a computer • many of the scanners use lasers, while others use camera lenses • scanners have even been implemented in cell phones, which allow users to take a photo of a barcode and the image is then sent toa database that translates the code Types of Barcodes Linear Barcode • large in size, but only has 1 piece of information: an identifying number used by computers to find a product 607014057011 2D Barcode • also known as matrix code • includes more information in the code, including price and quantity. Sources: Wasp http://www.explainthatstuff.com/barcodescanners.html http://cdn4.explainthatstuff.com/barcodestripes.gif http://www.facts-and-figures.org/Barcode-Scanner-and-Readers.html http://www.ehow.com/list_6629108_barcodes.html BARCODE TECHNOLOGIES each digit is represented by 7 equal-sized black or white vertical blocks each block has been designedoumber even accurately represents the: when it is upside down in a way that it to

How Barcode Scanners Work

shared by bafife on Apr 24
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In our world today, we’re accustomed to seeing barcodes, but most of us don’t have the slightest clue as to how these black and white striped graphics work, or even how they are properly read with...

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