Use of multiplexing QR code to increase information

1. USE MMUULLTTIIPPLLEEXXIINNGG TTOO IINNCCRREEAASSEE
IINNFFOORRMMAATTIIOONN IINN QQRR CCOODDEE

2. OVERVIEW
• Introduction
• Abstract
• Objective
• Literature Survey
• Proposed System Methodology
• Proposed System Architecture
• Conclusion
• References
Use multiplexing to increase information in QR code SJCET Palai 07/11/14 2

3. INTRODUCTION
•Quick Response ( QR ) code is developed by a corporation
Denso Wave which is a 2-D barcode in matrix form.
•Composed of black and white modules
•Widely used because of reading speed, accuracy & functionality
characteristic
•Maximum data capacity-
Use multiplexing to increase information in QR code SJCET Palai 07/11/14 3

4. • Method to improve QR code capacity
 Using multicolor
 Using multiplexing
• Using Multicolor
• Using Multiplexing
 Here multiple QR codes are clubbed together to one QR code to
increase capacity.
Contd…
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14

5. ABSTRACT
• This paper is a novel research on the application of
multiplexing in QR codes in order to increase the
capacity of QR code.
• This technique enables to embed more data than
ordinary QR codes.
• Multiplexing and demultiplexing involves special
symbols corresponding to number of QR code
patterns.
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14

6. OBJECTIVE
The objective of the current research is to obtain
the benefits of multiplexing to embed a large information
stored in QR code within same version and recovery rate.
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14

7. LITERATURE SURVEY
Title:- "Recognition of QR Code with mobile phones“ (Yue Lin, 2008)
 Proposed:
 QR code recognition using mobile phones is proposed in the reference
mentioned above
 Features used
 An image processing system based on mobile is described to be
able to binarize, locate, segment, and decode the QR Code.
 Limitations
 Phones that don't have autofocus cam, can't scan QR codes reliably.
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14

8. Title:- "CQR codes: Colored quick-response codes" (Max E. Vizcarra
Melga, Alexandre Zaghetto, Bruno Macchiavello, Anderson CA
Nascimento,2012)
Proposed
 Five different RGB colors (red, green, blue, black and white) were
used to enable twice as much information storage capacity to the QR
Code.
 Proposed scheme can consistently decode 1024 bits of information
stored on a 1.3 cm × 1.3 cm printed area.
 Features used
 Reed-Solomon error-correcting code with a theoretical correction
capability of 38.41% is applied.
Limitations
 Using many colors to the code will increase the capacity but may have
more problems with the threshold due to the intensity of light
compared with the black and white image.
Contd…
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14

9. PROPOSED SYSTEM METHODOLOGY
• Original information divided into n parts to form string of
characters.
• Data in each part is encoded into ordinary QR code.
• Basic characteristics of QR code are:
 Encodable character set - Numeric, Alphanumeric and Special
characters
 Representation of data - Dark and White modules
 Symbol size – No. of module & Version(1-40)
 Data characters per symbol
 Selectable error correction – L(7%) M(15%) Q(25%) H(30%)
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14

10. Contd…
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14

11. Contd…
• Modules corresponding to ordinary QR codes except for finder
pattern and timer pattern are multiplexed.
• Special black and white symbols of keyboard are used to
represent them.
Examples- / ^ < >
• No. of special symbols depends on no. of patterns.
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14

12. PROPOSED SYSTEM ARCHITECTURE
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14

13. Algorithm for Multiplexing
& Demultiplexing
Contd…
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14

14. Example of MUXing QR code
Contd…
•Done with an example
“Welcome to world of QR codes”
•Divided into 3 parts- “Welcome to” , “world of” , “ QR codes”
•3 QR code patterns were obtained.
• Corresponding modules were multiplexed (except finder
pattern and timing pattern) to form a QR code with
special
symbols.
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14

15. Contd…
• Special symbols were scanned at receiving end and
image was recognized by the program.
• The image was demultiplexed to its original QR code patterns
with 3 parts.
• Data in each QR code patterns were concatenated back to form
the original information message.
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14

16. CONCLUSION
• A novel method to embed large information in QR
code was achieved by multiplexing.
• Data can be multiplexed with accuracy in information
message.
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14

17. REFERENCES
• QR Images: Optimized Image Embedding in QR Codes Gonzalo J.
Garateguy, Student Member, IEEE, Gonzalo R. Arce, Fellow, IEEE,
Daniel L. Lau, Senior Member, IEEE, and Ofelia P. Villarreal, Member,
IEEE
• Chanon Skawattananon, Mahasak Ketcham, Sartid Vongpradhip ,
“Identifying QR Code”, International Conference on Computer and
Communication Technologies, pp.132-135, 2012.
• Grillo, A.; Lentini, A.; Querini M., Italiano, G.F., “High Capacity Colored
Two Dimensional codes”, International multi conference on Computer
Science and Information Technology, pp. 709-716, 2010.
• Sartid Vongpradhip and Suppat Rungraungsilp, “QR Code Using Invisible
Watermarking in Frequency Domain”, 9th International conference on ICT
and Knowledge Engineering, pp. 47-52, 2012.
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14

18. THANK
YOU.
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Use multiplexing to increase information in QR code SJCET Palai 07/11/14