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How 2-D Bar codes Work

How 2-D Bar codes Work. By: Megan Popp. What You Should Know…. 2-D bar codes, or Matrix codes Carry information vertically and horizontally 1-D codes=20 characters 2-D codes=4000 characters Small Easy to scan. How a QR Code Works. Finder Pattern Arrangement of squares

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How 2-D Bar codes Work

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  1. How 2-D Bar codes Work By: Megan Popp

  2. What You Should Know… • 2-D bar codes, or Matrix codes • Carry information vertically and horizontally • 1-D codes=20 characters • 2-D codes=4000 characters • Small • Easy to scan

  3. How a QR Code Works Finder Pattern • Arrangement of squares • Detects the size, direction and angle Alignment Pattern • Pattern of squares • Helps determine distortion Margins • Used for error • Can be scanned if smudged or obscured

  4. Using the Bar Codes • Camera processes the image • Software analyzes the image • Identifies the squares of alignment patterns and squares that contain data • Compensates for distortion or obscured areas • Examines the black and white square jumbles • Outputs data contained within square jumbles

  5. How bar codes benefit companies • UPS-MaxiCode: scans packages on conveyer belt quickly • US Department of Defense: Holds a lot of info in a small area

  6. 2-D Bar Codes… • Contain data • Contain built-in patterns (helps scanner decode information each bar code contains) • Have a device that reads a variety of different formats (including 1-D bar codes)

  7. How to Create Your Own Bar Code • Go online (several great 2-D bar code generators) • Can adjust the format • Can adjust the size of the code

  8. How Companies Use bar codes • Can track how many times the code has been scanned • Can track if they went on their website or purchased an item after scanning • Learn more about their customers (the time of day and part of country)

  9. Which Companies and Countries benefit the Most • In Japan, bar codes are found on highway billboards • Fashion company Tommy Bahama learns more about their customers (the time of day and part of country) • Target puts bar codes in magazines-when scanned, watch a video about product

  10. Sources: • Howstuffworks.com • Google Images

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