Pervasive 2D Barcodes for Camera Phone Applications
History <ul><li>2000 </li></ul><ul><ul><li>CyberCode1, Sony, visual tagging augmented reality </li></ul></ul><ul><ul><li>J...
Motivation: How well do they work? <ul><li>Omnidirectional symbol reading </li></ul><ul><li>Support for low-resolution cam...
Study <ul><li>30 2D barcodes are in use, 6 studied </li></ul><ul><li>database 2D barcodes = initially industrial </li></ul...
Denso Wave QR Code - 1994 Position detection patterns, located at three of symbol’s corners
3 Position detection
Data Contents <ul><li>QR Code can encode all types of data including symbols, binary data, control codes, and multimedia d...
Comparison with 1-D Bar Code
Solomon Reed Encoding
Redundancy <ul><li>Level L approximately 7 percent, </li></ul><ul><li>M approximately 15 percent </li></ul><ul><li>Q appro...
Code can be decomposed into smaller patterns
 
Veritec VSCode Biometric data for access-control applications. 4,151 bytes
Data Matrix <ul><li>1,556 bytes </li></ul>
Visual Code <ul><li>HCI using camera phones 83 bits –mouse </li></ul>
ShotCode Ternary  Code 102011221210001 Original Spot Code
ColorCode <ul><li>10 digits matrix of 5 cells rendered— black, blue, green, and red. </li></ul><ul><li>error parity check ...
 
 
Results
Results <ul><li>Resolution not so important </li></ul><ul><li>2D barcodes (21.7 cm) > </li></ul><ul><li>index-based 2D-bar...
Upcoming SlideShare
Loading in...5
×

2 d barcodes(NSM)

338

Published on

About barcode

Published in: Education
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
338
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
9
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

2 d barcodes(NSM)

  1. 1. Pervasive 2D Barcodes for Camera Phone Applications
  2. 2. History <ul><li>2000 </li></ul><ul><ul><li>CyberCode1, Sony, visual tagging augmented reality </li></ul></ul><ul><ul><li>J-SH09, J-Phone - QR Code: 1-D and 2-D phone </li></ul></ul><ul><li>QR Code Blog </li></ul><ul><li>URLS </li></ul><ul><li>Email addresses </li></ul><ul><li>Shopping </li></ul><ul><li>Public Transport Schedules and Events </li></ul><ul><li>Air Line Ticketing </li></ul><ul><li>Coke Promotions </li></ul><ul><li>Food-history information service </li></ul>
  3. 3. Motivation: How well do they work? <ul><li>Omnidirectional symbol reading </li></ul><ul><li>Support for low-resolution cameras </li></ul><ul><li>Reading robustness under different lighting conditions </li></ul><ul><li>Barcode reading distance </li></ul><ul><li>Error correction capability </li></ul><ul><li>Security </li></ul><ul><li>Support for multiple character sets </li></ul><ul><li>Data capacity </li></ul>
  4. 4. Study <ul><li>30 2D barcodes are in use, 6 studied </li></ul><ul><li>database 2D barcodes = initially industrial </li></ul><ul><ul><li>QR Code </li></ul></ul><ul><ul><li>VSCode </li></ul></ul><ul><ul><li>Data Matrix </li></ul></ul><ul><li>Index-based 2D barcodes = invented for phones </li></ul><ul><ul><li>Visual Code </li></ul></ul><ul><ul><li>ShotCode </li></ul></ul><ul><ul><li>ColorCode </li></ul></ul>
  5. 5. Denso Wave QR Code - 1994 Position detection patterns, located at three of symbol’s corners
  6. 6. 3 Position detection
  7. 7. Data Contents <ul><li>QR Code can encode all types of data including symbols, binary data, control codes, and multimedia data. The maximum data capacities are </li></ul><ul><li>7,089 characters for numeric data, </li></ul><ul><li>4,296 characters for alphanumeric data, </li></ul><ul><li>2,953 bytes for binary data, and </li></ul><ul><li>1,817 characters for Japanese Kanji and Kana data. </li></ul>
  8. 8. Comparison with 1-D Bar Code
  9. 9. Solomon Reed Encoding
  10. 10. Redundancy <ul><li>Level L approximately 7 percent, </li></ul><ul><li>M approximately 15 percent </li></ul><ul><li>Q approximately 25 percent </li></ul><ul><li>H approximately 30 percent </li></ul>
  11. 11. Code can be decomposed into smaller patterns
  12. 13. Veritec VSCode Biometric data for access-control applications. 4,151 bytes
  13. 14. Data Matrix <ul><li>1,556 bytes </li></ul>
  14. 15. Visual Code <ul><li>HCI using camera phones 83 bits –mouse </li></ul>
  15. 16. ShotCode Ternary Code 102011221210001 Original Spot Code
  16. 17. ColorCode <ul><li>10 digits matrix of 5 cells rendered— black, blue, green, and red. </li></ul><ul><li>error parity check that detects any incorrect color recognition and corrects it </li></ul><ul><li>40 percent visibility </li></ul>
  17. 20. Results
  18. 21. Results <ul><li>Resolution not so important </li></ul><ul><li>2D barcodes (21.7 cm) > </li></ul><ul><li>index-based 2D-barcodes (16.9 cm) </li></ul>
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×