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Efficient Verification of Holograms
Using Mobile Augmented Reality
PRESENTED BY,
AKHIL MUKUNDAN
ROLL NO. 29
S7 CSE
ISSAT
G...
Introduction
• Paper Documents are frequently checked by inspection of security element.
• Holograms are important securit...
Contents
• Introduction
• Existing System
• Proposed Technology
• Augmented Reality
• Hologram Verification with Mobiles
•...
Existing System
• Holograms incorporates wide variety of security elements in it.
• They can be viewed by changing the vie...
Contd.
• In real-world situations, manuals are not always at hand, so users fall
back to solely looking for appearance cha...
Proposed Technology
• Capture reference data from holograms along with a matching
approach that can be used for automatic ...
Augmented Reality
• A live direct or indirect view of a physical, real-world environment.
• Elements are augmented (or sup...
Hologram Verification with Mobiles
• Capturing hologram patches
• View alignment/user guidance
• Mobile AR prototype
• Eva...
Hologram Capture
• Assumption
• Total radiance from a point on the hologram is dominated by a single light source
• Fixed ...
View alignment
Objective
• Mobile method for alignment with a given pose
• Reasonable accuracy despite mobile environment
...
Preprocessing
• Capturing Reference Data With moderate ambient light.
• Appearance of a hologram is largely dominated by u...
Contd.
• We assume the hologram to be planar and project its bounding box
into the image using the recorded pose.
• Result...
Runtime Processing
Classification and Tracking
• Identification of the document type.
Matching
• Evaluate similarity measu...
Interface Design
• Guide the user to align the mobile device with exactly those view
points which are associated with the ...
1.Concept and Graphical Representation
• The user should be guided towards different viewing directions or
ranges.
• A 2D ...
Contd.
Efficient Verification of Holograms Using Mobile Augmented
Reality
16
2.User-Oriented Parametrization
• Changes in orientation generally took place roughly along the vertical
and horizontal ax...
Orientation changes
Efficient Verification of Holograms Using Mobile Augmented
Reality
18
Fig 1 Fig 2
Findings and Discussion
• Holograms can be assessed by the system immediately after image
capture, which takes approximate...
Contd.
Efficient Verification of Holograms Using Mobile Augmented
Reality
20
Applications
• Detection of fake documents.
• Counterfeit currency detection.
• Enhanced verification of passports and vis...
Conclusion
• Capture of holograms and view alignment worked reasonably well.
• Hologram verification on mobiles seams feas...
References
• R. L. van Renesse. Optical Document Security. Artech House, third edition, 2005.
• T.-H. Park and H.-J. Kwon....
Thank You
Efficient Verification of Holograms Using Mobile Augmented
Reality
25
Any
Questions?
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Efficient verification of holograms using mobile augmente reality

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Efficient verification of holograms using mobile augmente reality

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Efficient verification of holograms using mobile augmente reality

  1. 1. Efficient Verification of Holograms Using Mobile Augmented Reality PRESENTED BY, AKHIL MUKUNDAN ROLL NO. 29 S7 CSE ISSAT GUIDED BY, Ms. NEENU SHEREEF
  2. 2. Introduction • Paper Documents are frequently checked by inspection of security element. • Holograms are important security element, but difficult to inspect. • Augmented Reality can provide relevant information on standard mobile devices. • First evaluate a series of similarity measures for matching hologram patches. • That provides a sound basis for automatic decisions. • Enables faster verification of documents. Efficient Verification of Holograms Using Mobile Augmented Reality 2
  3. 3. Contents • Introduction • Existing System • Proposed Technology • Augmented Reality • Hologram Verification with Mobiles • Hologram Capture • Processing • Interface Design • Findings and Discussions • Applications • Conclusion • References Efficient Verification of Holograms Using Mobile Augmented Reality 3
  4. 4. Existing System • Holograms incorporates wide variety of security elements in it. • They can be viewed by changing the viewing angle or by changing the angle of incident light. • Requires an individual to find all relevant patterns listed in a manual by looking at the hologram. • Only trained individuals can efficiently verify them. • Manuals often lack an indication on the viewing direction and do not specify requirements on lighting conditions. Efficient Verification of Holograms Using Mobile Augmented Reality 4
  5. 5. Contd. • In real-world situations, manuals are not always at hand, so users fall back to solely looking for appearance changes. • People inspect holograms on security documents just by looking for changes in appearance or the pure presence of rainbow colors. • This has no particular value regarding security. • Development of tools and algorithms for the automatic detection and verification of holograms by laypeople deserves our interest. Efficient Verification of Holograms Using Mobile Augmented Reality 5
  6. 6. Proposed Technology • Capture reference data from holograms along with a matching approach that can be used for automatic verification at runtime. • Performs classification, tracking and augmentation of relevant information. • This allows to select the correct reference information for hologram verification. • Ensures that the elements are observed from the correct viewpoint. • This setup serves as a basic building block for mobile hologram verification with appropriate user guidance and visualization. Efficient Verification of Holograms Using Mobile Augmented Reality 6
  7. 7. Augmented Reality • A live direct or indirect view of a physical, real-world environment. • Elements are augmented (or supplemented) by computer-generated sensory input such as sound, video, graphics or GPS data. • Replaces the real world with a simulated one. Efficient Verification of Holograms Using Mobile Augmented Reality 7
  8. 8. Hologram Verification with Mobiles • Capturing hologram patches • View alignment/user guidance • Mobile AR prototype • Evaluation within user study • Revision of the prototype Efficient Verification of Holograms Using Mobile Augmented Reality 8
  9. 9. Hologram Capture • Assumption • Total radiance from a point on the hologram is dominated by a single light source • Fixed distance to surface • Dominant Light Source • LED light on mobile phone • Fixed to the camera with offset vector Efficient Verification of Holograms Using Mobile Augmented Reality 9
  10. 10. View alignment Objective • Mobile method for alignment with a given pose • Reasonable accuracy despite mobile environment Approach • Visual guidance with iron sights and a virtual horizon • 1 matching direction of the viewing ray • 2 position along the ray • 3 in-plane rotation Efficient Verification of Holograms Using Mobile Augmented Reality 10 1 2 3
  11. 11. Preprocessing • Capturing Reference Data With moderate ambient light. • Appearance of a hologram is largely dominated by using the LED flashlight of mobile devices. • The workspace consists of a hemisphere centered at the hologram on the document. • Capture the current video image and the corresponding pose for each position on the hemisphere. Efficient Verification of Holograms Using Mobile Augmented Reality 11
  12. 12. Contd. • We assume the hologram to be planar and project its bounding box into the image using the recorded pose. • Results a set of registered image patches that represent all observable appearances of the current hologram. • Exclude all data recorded < 5 degree and > 55 degree away from the orthogonal view. • In order to avoid artifacts caused by oblique views and tracking failure. Efficient Verification of Holograms Using Mobile Augmented Reality 12
  13. 13. Runtime Processing Classification and Tracking • Identification of the document type. Matching • Evaluate similarity measures such as • Perform linear scaling of matching scores using coefficients obtained by analysis of all recorded patch data. Efficient Verification of Holograms Using Mobile Augmented Reality 13 1. Manual selection 2. Computing from image 1. Sum of Absolute Differences (SAD) 2. Normalized cross correlation (NCC)
  14. 14. Interface Design • Guide the user to align the mobile device with exactly those view points which are associated with the selected reference data. • User-friendly hybrid interface together with automatic matching which makes the hologram verification more accessible. • Facts regarding interface design are: Efficient Verification of Holograms Using Mobile Augmented Reality 14 1. Concept and Graphical Representation 2. User-Oriented Parametrization
  15. 15. 1.Concept and Graphical Representation • The user should be guided towards different viewing directions or ranges. • A 2D orientation map (projection of the conic space) is used for this task. • It is divided into slices that are aligned on one or more tracks. • We record several shots per slice that differ at least by a given angle threshold. • Small arrows around the cursor serve as movement indicators. • The upper arc switches from red to green with increasing slice coverage. Efficient Verification of Holograms Using Mobile Augmented Reality 15
  16. 16. Contd. Efficient Verification of Holograms Using Mobile Augmented Reality 16
  17. 17. 2.User-Oriented Parametrization • Changes in orientation generally took place roughly along the vertical and horizontal axes. • Conducted an experiment with people. • They are asked to record a hologram document with smartphone. • Provided two approaches: • Both approaches made considerable differences. Efficient Verification of Holograms Using Mobile Augmented Reality 17 1. Document and phone held on their hands 2. Document placed on a table
  18. 18. Orientation changes Efficient Verification of Holograms Using Mobile Augmented Reality 18 Fig 1 Fig 2
  19. 19. Findings and Discussion • Holograms can be assessed by the system immediately after image capture, which takes approximately 15 seconds. • A subsequent decision by the user takes another 20s. • The system was able to assess the hologram correctly in all cases. • Users were unsure about the validity of the hologram in 10.94 percent of all cases. • Succeeded to give a correct decision in 85.94 percent of all cases Efficient Verification of Holograms Using Mobile Augmented Reality 19
  20. 20. Contd. Efficient Verification of Holograms Using Mobile Augmented Reality 20
  21. 21. Applications • Detection of fake documents. • Counterfeit currency detection. • Enhanced verification of passports and visa. • For checking identity cards. • Can replace barcode system. Efficient Verification of Holograms Using Mobile Augmented Reality 21
  22. 22. Conclusion • Capture of holograms and view alignment worked reasonably well. • Hologram verification on mobiles seams feasible. • Takes less amount to complete verification than that of manual method. • Verification is possible under optimal lighting conditions. • Mobile AR systems can serve as tools for the verification of holograms by laypeople. Efficient Verification of Holograms Using Mobile Augmented Reality 22
  23. 23. References • R. L. van Renesse. Optical Document Security. Artech House, third edition, 2005. • T.-H. Park and H.-J. Kwon. Vision inspection system for holograms with mixed patterns. In CASE, pages 563–567, 2010. • M. Haindl and J. Filip. Visual Texture. Advances in Computer Vision and Pattern Recognition. Springer Verlag, 2013 • J. Jachnik, R. A. Newcombe, and A. J. Davison. Real-time surface light-field capture for augmentation of planar specular surfaces. In ISMAR, pages 91–97, 2012 • P. Ren, J. Wang, J. Snyder, X. Tong, and B. Guo. Pocket reflectometry. n Proc. SIGGRAPH 2011, SIGGRAPH ’11, pages 45:1–45:10, New York, NY, USA, 2011. ACM. Efficient Verification of Holograms Using Mobile Augmented Reality 23
  24. 24. Thank You
  25. 25. Efficient Verification of Holograms Using Mobile Augmented Reality 25 Any Questions?

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