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Embedding QR Codes on the Interior Surfaces of FFF Fabricated Parts

Sinan Gültekin, Ahmet Ural, Ulas Yaman
2019 Procedia Manufacturing  
In this study, we propose an automated approach for embedding QR codes on the interior flat surfaces of 3D printed artifacts.  ...  In this study, we propose an automated approach for embedding QR codes on the interior flat surfaces of 3D printed artifacts.  ...  Surface fitting is an important issue for embedding QR codes into the B-spline surfaces.  ... 
doi:10.1016/j.promfg.2020.01.411 fatcat:wna32hyfmvgphlcgamovymsqoe

Embedding Information into or onto Additively Manufactured Parts: A Review of QR Codes, Steganography and Watermarking Methods

Muhammad Usama, Ulas Yaman
2022 Materials  
The four categories discussed are 3D QR codes, 3D watermarking, steganography and nonclassified methods.  ...  The paper gives a detailed review of the approaches adopted for embedding information into/onto additively manufactured parts.  ...  They proposed a novel technique to embed QR codes onto freeform surfaces which were represented by B-splines.  ... 
doi:10.3390/ma15072596 pmid:35407928 pmcid:PMC9000573 fatcat:wv6su7iwbbezbilcbi3foxlkre

Texture to the Rescue: Practical Paper Fingerprinting based on Texture Patterns [article]

Ehsan Toreini, Siamak F. Shahandashti, Feng Hao
2019 arXiv   pre-print
Through experiments, we demonstrate that the embedded paper texture provides a more reliable source for fingerprinting than features on the surface.  ...  We show these patterns can be easily captured by a commodity camera and condensed into to a compact 2048-bit fingerprint code.  ...  Fig. 13 : 13 Generated QR Code in the authentication protocol. This QR code contains the encrypted fingerprint, H(k) and a digital signature for both items.  ... 
arXiv:1705.02510v3 fatcat:zk4yx6duirhnpjtwxsdp7mcwry

Texture to the Rescue

Ehsan Toreini, Siamak F. Shahandashti, Feng Hao
2017 ACM Transactions on Privacy and Security  
Through experiments, we demonstrate that the embedded paper texture provides a more reliable source for fingerprinting than features on the surface.  ...  We show these patterns can be easily captured by a commodity camera and condensed into to a compact 2048bit fingerprint code.  ...  This QR code contains the encrypted fingerprint, H(k) and a digital signature for both items.  ... 
doi:10.1145/3092816 fatcat:fvmshzosfvdcnlfzlm6wvkcgii

Temporal diffeomorphic free-form deformation: Application to motion and strain estimation from 3D echocardiography

Mathieu De Craene, Gemma Piella, Oscar Camara, Nicolas Duchateau, Etelvino Silva, Adelina Doltra, Jan D'hooge, Josep Brugada, Marta Sitges, Alejandro F. Frangi
2012 Medical Image Analysis  
The originality of our approach resides in enforcing time consistency by representing the 4D velocity field as the sum of continuous spatiotemporal B-Spline kernels.  ...  TDFFD was compared to pairwise 3D FFD and 3D+t FFD, both on displacement and velocity fields, on a set of synthetic 3D US images with different noise levels.  ...  The purpose of this experiment was to determine the optimal setting for the initial resolution of the 3D+t B-Spline grid.  ... 
doi:10.1016/j.media.2011.10.006 pmid:22137545 fatcat:4tfs6t6n4jhzng3u3xahd2twka

Shape-Up: Shaping Discrete Geometry with Projections

Sofien Bouaziz, Mario Deuss, Yuliy Schwartzburg, Thibaut Weise, Mark Pauly
2012 Computer graphics forum (Print)  
The proximity function encodes the distance of a desired least-squares fitted elementary target shape to the corresponding vertices of the 3D model.  ...  Abstract We introduce a unified optimization framework for geometry processing based on shape constraints.  ...  for proof-reading the paper and giving valuable comments, and Pierre Alliez, David Bommes, Daniel Piker, and AIM@SHAPE for providing 3D models.  ... 
doi:10.1111/j.1467-8659.2012.03171.x fatcat:t7gqqk75cnbvnbfufnbkxszx5q

Identity Document and banknote security forensics: a survey [article]

Albert Berenguel Centeno, Oriol Ramos Terrades, Josep Lladós Canet, Cristina Cañero Morales
2019 arXiv   pre-print
to detect these counterfeits, the present survey covers a wide range of anti-counterfeiting security features, categorizing them into three components: security substrate, security inks and security printing  ...  Another contender for the first cashless country in the world is in China, embraced with the QR codes [149] .  ...  Paper surface formed by overlapped and inter-twisted wood fiber forms an inherent unique 3D structure.  ... 
arXiv:1910.08993v1 fatcat:6onl6iprozbm3m7r3rea6xlnfq

CARS 2021: Computer Assisted Radiology and Surgery Proceedings of the 35th International Congress and Exhibition Munich, Germany, June 21–25, 2021

2021 International Journal of Computer Assisted Radiology and Surgery  
In order to measure the accuracy of the QR-code recognition, a calibration setup was built in which the HoloLens was placed onto a 3D-printed bearer and the QR-code could be moved manually in two different  ...  Additionally, the QR-code used for tracking and the QR-code placed onto the surgical pointer (blue) are visible. The surgical pointer is used to pinpoint the anatomical landmark for the HoloLens 2.  ... 
doi:10.1007/s11548-021-02375-4 pmid:34085172 fatcat:6d564hsv2fbybkhw4wvc7uuxcy

Modelling and traceability for computationally-intensive precision engineering and metrology

J.M. Linares, G. Goch, A. Forbes, J.M. Sprauel, A. Clément, F. Haertig, W. Gao
2018 CIRP annals  
Some prospects for this complex task will finally be suggested.  ...  This is the case for poor implementations and poorly conditioned algorithms. Therefore, accurate geometric modelling and implementations will be detailed.  ...  We also would like to give thanks to Tyler Estler (NIST) for his valuable comments.  ... 
doi:10.1016/j.cirp.2018.05.003 fatcat:agtlmplwvzak7kdltepugnnpqy

Nuclear crowding and nonlinear diffusion during interkinetic nuclear migration in the zebrafish retina

Afnan Azizi, Anne Herrmann, Yinan Wan, Salvador Jrp Buse, Philipp J Keller, Raymond E Goldstein, William A Harris
2020 eLife  
An important question in early neural development is the origin of stochastic nuclear movement between apical and basal surfaces of neuroepithelia during interkinetic nuclear migration.  ...  Tracking of nuclear subpopulations has shown evidence of diffusion - mean squared displacements growing linearly in time - and suggested crowding from cell division at the apical surface drives basalward  ...  Acknowledgements We thank Kevin O'Holleran and Martin Lenz at Cambridge Advanced Imaging Centre for their help and support in imaging zebrafish retinas.  ... 
doi:10.7554/elife.58635 pmid:33021471 pmcid:PMC7538155 fatcat:dgcewr4jfnhmjjy7euycazrhbu

TOOLKIT FOR IMMERSIVE VIRTUAL SIMULATORS WITH BIOFEEDBACK

V. V. Gribova, V. O. Strekalev
2020 Vestnik komp iuternykh i informatsionnykh tekhnologii  
An overview of existing solutions such as tools for the development and reproduction of virtual simulators is considered.  ...  The architecture of the instrumental complex for the creation and reproduction of immersive virtual simulators using biological feedback is proposed.  ...  One of the most common coded tags is the QR code, an example of which is shown in Figure 9 .12. 268 S. M.  ... 
doi:10.14489/vkit.2020.08.pp.019-028 fatcat:nyet4p3qkvecliahuktcjbkwbu

Artificial neural networks

J.J. Hopfield
1988 IEEE Circuits & Devices  
B-spline networks B-splines have been employed as surface-fitting algorithms for the past twenty years.  ...  Mathematically, the weight W k,i can be described as: (1.9) Another network that has embedded the concept of distance from centres is the B-Spline neural network.  ...  Having defined stability we shall now introduce the Lyapunov method for determining stability.  ... 
doi:10.1109/101.8118 fatcat:c6royelcdzfethnmmur2tj524i

A design methodology for 2D sparse NDE arrays using an efficient implementation of refracted-ray TFM

Jerzy Dziewierz, Timothy Lardner, Anthony Gachagan
2013 2013 IEEE International Ultrasonics Symposium (IUS)  
Recent advances in the field of tissue engineering include the engineering of skin, cartilage, and bladder, all of which are relatively thin tissues that can rely on diffusion for the delivery of oxygen  ...  The development of more complex tissues has been limited by the need for techniques that can rapidly organize cells and proteins within large three-dimensional scaffolds, and the need to create vascular  ...  The authors acknowledge the ANR and DGA for their support under the project Metactif, grant ANR-11-ASTR-015.  ... 
doi:10.1109/ultsym.2013.0035 fatcat:th5znfh7y5bklfdbmhb4u6iq2i

JCS/JHRS 2019 Guideline on Non-Pharmacotherapy of Cardiac Arrhythmias

Akihiko Nogami, Takashi Kurita, Haruhiko Abe, Kenji Ando, Toshiyuki Ishikawa, Katsuhiko Imai, Akihiko Usui, Kaoru Okishige, Kengo Kusano, Koichiro Kumagai, Masahiko Goya, Yoshinori Kobayashi (+47 others)
2021 Circulation Journal  
Recommendations and Evidence Levels for Patients With Infection of CIED System. We added the reference number in the footnote.  ...  Correct: In the JCS guideline on infective endocarditis, 410 part of the recommendation level is inconsistent with that in this guideline, because the recommendations for surgical removal and cardiac vegetation  ...  The authors apologize for the error in the typesetting. Corrections are shown below.  ... 
doi:10.1253/circj.cj-20-0637 pmid:34078838 fatcat:vxu7eakjrnbivgopaexbwfgwze

JCS/JHRS 2019 guideline on non‐pharmacotherapy of cardiac arrhythmias

Akihiko Nogami, Takashi Kurita, Haruhiko Abe, Kenji Ando, Toshiyuki Ishikawa, Katsuhiko Imai, Akihiko Usui, Kaoru Okishige, Kengo Kusano, Koichiro Kumagai, Masahiko Goya, Yoshinori Kobayashi (+47 others)
2021 Journal of Arrhythmia  
Information on catheter ablation includes radiation exposure, new 3D mapping systems, balloon ablation for AF, bipolar ablation, and chemical ablation.  ...  The information on surgical treatment for arrhythmia mainly focuses on surgical treatment for AF and VT.  ...  The surface area can be reduced by using a printed electrode attached only to the outside of the spline, to obtain local potential information. b. | Clinical application.  ... 
doi:10.1002/joa3.12491 fatcat:mhmdd6xppred7oehln4hefdwiu
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