TY - JOUR AU - Papp, György AU - Hoffmann, Miklós AU - Papp, Ildikó TI - Embedding QR Code onto Triangulated Meshes using Horizon Based Ambient Occlusion JF - COMPUTER GRAPHICS FORUM J2 - COMPUT GRAPH FORUM VL - 41 PY - 2022 IS - 1 SP - 29 EP - 45 PG - 17 SN - 0167-7055 DO - 10.1111/cgf.14394 UR - https://m2.mtmt.hu/api/publication/32398605 ID - 32398605 N1 - Cited By :1 Export Date: 24 March 2023 CODEN: CGFOD Correspondence Address: Papp, G.; Doctoral School of Informatics, Hungary; email: papp.gyorgy@inf.unideb.hu Funding details: European Commission, EC Funding details: European Social Fund, ESF Funding text 1: This work was supported by the construction EFOP‐3.6.3‐VEKOP‐16‐2017‐00002. The project was supported by the European Union, co‐financed by the European Social Fund. AB - QR code is a widely used format to encode information through images that can be easily decoded using a smartphone. These devices play a significant role in most people's everyday lives, making the encoded information widely accessible. However, decoding the QR code becomes challenging when significant deformations occur in the label. An easy and quick solution to keep the deformation on a minimum level is to affix the label that contains the QR code onto a developable surface patch of a 3D model. The perspective distortion that can appear is efficiently dealt with during the decoding process. In recent years an alternative method has emerged. In the work of Kikuchi et al., the QR code is embedded onto B-spline surfaces of CAD models to give more freedom in providing additional information. This method was further improved and extended by Peng et al. embed QR codes onto the surface of general meshes. This paper introduces a solution to embed QR codes onto the surface of general meshes without densely triangulating the selected area of the QR code. It uses the deferred shading technique to extract the surface normals and the depth values around the QR code's user-given centre. We propose two methods for automatically finding the projection direction even when highly curved areas are selected based on the retrieved information while rendering the model. Besides, we introduce two methods needing a projection direction and a QR code centre to determine a size for automatically embedding the QR code. We propose patterns for decreasing the carving depth of the embedded QR codes, and we use the Horizon-Based Ambient Occlusion to speed up the engraving process. We validate our method by comparing our results to the outcomes of Peng et al. LA - English DB - MTMT ER - TY - JOUR AU - Papp, György AU - Hoffmann, Miklós AU - Papp, Ildikó TI - Improved Embedding of QR Codes onto Surfaces to be 3D Printed JF - COMPUTER-AIDED DESIGN J2 - COMPUT AIDED DESIGN VL - 131 PY - 2021 SN - 0010-4485 DO - 10.1016/j.cad.2020.102961 UR - https://m2.mtmt.hu/api/publication/31661480 ID - 31661480 N1 - Cited By :6 Export Date: 6 December 2022 CODEN: CAIDA Correspondence Address: Papp, G.; University of Debrecen, Kassai 26, Hungary; email: papp.gyorgy@inf.unideb.hu Funding details: European Commission, EC Funding details: European Social Fund, ESF Funding text 1: This work was supported by the construction EFOP-3.6.3-VEKOP-16-2017-00002. The project was supported by the European Union, co-financed by the European Social Fund . AB - Providing additional information for parts or items usually means to enclose it next to the object or affix it on the component when that is possible. However, another solution is available by gaining the benefits of an additive manufacturing technology, 3D printing. This technology makes it possible to embed the additional information onto the surface of the items, for example, in the forms of QR codes. In the work of Kikuchi et al. (2018), the QR code is embedded into CAD models that consist of B-spline surfaces by grooving its dark regions to shadow them. The method proposed by Peng et al. (2019) optimized the modules of the QR code and the depth to carve its dark modules into any general mesh. However, embedding the QR code with these methods, in some cases, especially in case of highly curved surfaces, the QR code is deformed during the process of projection onto the surface. This deformation can highly restrict the readability of the QR code. In this paper, we propose an improved method to embed QR codes onto free-form surfaces by using a low-end consumer-level 3D printer. Our aim is to provide a robust method to project the QR code onto surfaces even with high curvature. We discuss the problematic cases for the works mentioned above, and we present a process to find an optimal position and direction of projection for the QR code to avoid deformations on highly curved surfaces. To validate our method, we compare our results with the outcomes of Kikuchi et al. (2018) and Peng et al. (2019). (c) 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). LA - English DB - MTMT ER - TY - CONF AU - Papp, György AU - Hoffmann, Miklós AU - Papp, Ildikó TI - Embedding QR code onto triangulated meshes T2 - The 12th Conference of PhD Students in Computer Science PB - Szegedi Tudományegyetem (SZTE) C1 - Szeged PY - 2020 SP - 79 EP - 82 PG - 4 UR - https://m2.mtmt.hu/api/publication/31633632 ID - 31633632 LA - English DB - MTMT ER - TY - CONF AU - Papp, György AU - Hoffmann, Miklós AU - Papp, Ildikó ED - Kovásznai, Gergely ED - Fazekas, István ED - Tómács, Tibor TI - Improved QR code embedding for meshes with 3D printing T2 - Proceedings of the 11th International Conference on Applied Informatics (ICAI 2020) PB - CEUR Workshop Proceedings C1 - Eger T3 - CEUR Workshop Proceedings, ISSN 1613-0073 ; 2650. PY - 2020 UR - https://m2.mtmt.hu/api/publication/31252967 ID - 31252967 LA - English DB - MTMT ER - TY - CONF AU - Papp, György AU - Hoffmann, Miklós AU - Papp, Ildikó TI - Improved projection for embedding QR code onto surfaces to be 3D printed T2 - Graphics and Application The 12th Asian Forum on Graphic Science (AFGS 2019) PY - 2019 SP - 116 EP - 117 PG - 2 UR - https://m2.mtmt.hu/api/publication/30882132 ID - 30882132 LA - English DB - MTMT ER - TY - CHAP AU - Papp, György AU - Kunkli, Roland Imre ED - Tremeau, Alain ED - Telea, Alexandru ED - Richard, Paul ED - Kerren, Andreas ED - Imai, Francisco ED - Cláudio, Ana Paula ED - Chessa, Manuela ED - Bechmann, Dominique TI - TabularVis: An Interactive Relationship Visualization Tool Supported by Optimization and Search Algorithms T2 - Computer Vision, Imaging and Computer Graphics Theory and Applications PB - Springer Netherlands CY - Cham SN - 9783030267568 T3 - Communications in Computer and Information Science, ISSN 1865-0929 ; 997. PY - 2019 SP - 167 EP - 192 PG - 26 DO - 10.1007/978-3-030-26756-8_8 UR - https://m2.mtmt.hu/api/publication/30776671 ID - 30776671 LA - English DB - MTMT ER - TY - CHAP AU - Papp, György AU - Papp, Ildikó AU - Kunkli, Roland Imre ED - Hudoba, Péter ED - Hajdu, Flóra TI - Possibilities of Using Orthogonally Intersecting Conics in Circular Layout Based Relationship Visualization T2 - 6th Winter School of PhD Students in Informatics and Mathematics PB - Section of Mathematical and Information Sciences Association of Hungarian PhD and DLA Students CY - Budapest SN - 9786155586378 PY - 2019 SP - 28 PG - 1 UR - https://m2.mtmt.hu/api/publication/30716115 ID - 30716115 LA - English DB - MTMT ER - TY - CONF AU - Papp, György AU - Papp, Ildikó AU - Kunkli, Roland Imre ED - Hans-Peter, Schröcker TI - Construction and Properties of Orthogonally Intersecting Conics in Relationship Visualization T2 - Conference on Geometry: Theory and Applications; University of Innsbruck, June 3–7, 2019 PB - University of Innsbruck C1 - Innsbruck PY - 2019 SP - 27 PG - 1 UR - https://m2.mtmt.hu/api/publication/30713651 ID - 30713651 LA - English DB - MTMT ER - TY - CONF AU - Papp, György AU - Kunkli, Roland Imre TI - Connecting genomic regions with circular arcs T2 - VIZBI 2018 - Visualizing Biological Data, Posters | VIZBI (https://vizbi.org/Posters/2018/) PY - 2018 UR - https://m2.mtmt.hu/api/publication/30777108 ID - 30777108 LA - English DB - MTMT ER - TY - CHAP AU - Papp, György AU - Kunkli, Roland Imre ED - Hudoba, Péter TI - RELATIONSHIP VISUALIZATION OF TABULAR DATA BASED ON HYPERBOLIC GEOMETRY T2 - 5th Winter School of PhD Students in Informatics and Mathematics PB - Doktoranduszok Országos Szövetsége (DOSZ) CY - Budapest SN - 9786155586231 PY - 2018 SP - 39 UR - https://m2.mtmt.hu/api/publication/3351580 ID - 3351580 LA - English DB - MTMT ER -