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Advanced Techniques Demo Using OpenGL
Buček, Antonín ; Přibyl, Jaroslav (referee) ; Herout, Adam (advisor)
This thesis demonstrates advanced techniques using OpenGL. The work is conceived as a demo without any size restrictions. It focuses on creating 3D world, which consists of inner rooms complex. Some additional interesting objects, lighting and shadows enrich the rooms. Particle systems, which were used to create explosions, smokes and some other particle effects are described in the thesis, too. 3D machine models fight between themselves using laser beams and form the story of the demo. Important part of the work is a movement model which is applied to both models and avatar. Sound track completes the demo.
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Searching for Similar 3D Models
Sálus, Ondřej ; Beran, Vítězslav (referee) ; Španěl, Michal (advisor)
Goal of this paper is development of aplication for comparing of 3D models. It deals with extraction od descriptors suitable for comparing of 3D models and enables to find models similar to users query. For extraction of descriptors application uses Reeb graph method. This paper also describes usage of libraries that implements Reeb graph method and some experiments with speed and quality over pre prepared models database.
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Usage of the Fused Deposition Modeling Method for Medical Purposes
Ševčíková, Lucie ; Zouhar, Jan (referee) ; Sedlák, Josef (advisor)
The bachelor‘s thesis deals with the use of medical devices for medical purposes. The first part focuses on the current state of the problem and describes the current rapid prototyping technology. The second part describes an implementation of production of knee joint bones, a 3D printer by using the method uPrint Fused Deposition Modeling and deals with the evaluation of the cost of producing 3D models using the Fused Deposition Modeling in comparison with other current technologies.
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Watermarking 3D Models
Stehlík, Václav ; Beran, Vítězslav (referee) ; Španěl, Michal (advisor)
This bachelor's thesis is dedicated to embedding and extraction of watermarks to/from 3D models represented by polygonal mesh. The goal is to choose a suitable method for watermark embedding and extraction to/from a 3D model for the purpose of implementing a tool of such capabilities. The resulting solution uses methods proposed in article A Novel Blind Robust Digital Watermarking on 3D Meshes . Used methods create two watermarks. 'OTC' watermark that changes vertices of the model and 'Zero' watermark that does not change the model at all. These watermarks provide robustness against attacks and modification such as translation, scaling, rotation, simplification, random noise, remeshing and vertex reordering. Used methods also preserve imperceivability of watermark thanks to minimal changes of the model. Methods are blind and do not require original model. The tool is implemented in a form of simple web application which allows user to embed and extract watermark to/from files in stl format. This work includes testing and evaluation of success and usability of the tool against various attacks on chosen test set of models.
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Watermarking 3D Models
Honzátková, Tereza ; Herout, Adam (referee) ; Španěl, Michal (advisor)
Goals of this work are to summarize the process and existing methods of 3D models watermarking, to choose relevant methods for embedding/extraction of a watermark to/from 3D models. The final solution is based on Spectral Mesh Compression technique. This method is robust, imperceptible and informed. The embedded watermark is detectable and robust against geometrical transformations, added random noise, mesh smoothing and simplification, compression and cropping. The realized tool allows a user to embedding watermark into the mesh, modify the mesh and extraction of a watermark from mesh. Testing was conducted on a set of 5 models differing in size, shape and density of points. The resulting tool inserts a watermark composed of four characters that can detect both undamaged models and the models affected. Among the attacks against which the watermark is robust, include transformations, rotation, scale, adaptive random noise, and combination of this.
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In vitro models for studying Syncytin-1-induced fusion of trophoblast cells
Jech, Lukáš ; Trejbalová, Kateřina (advisor) ; Zíková, Martina (referee)
Trophoblast cell fusion is essential for human placenta development. Apart from initiating blastocyst implantation, syncytialization is critical for optimal nutrient and gas exchange between mother and fo- etus. Multicellular syncytia called syncytiotrophoblast covers the surface of the branched structure of chorionic villi, which is in direct contact with maternal blood. Impairment of the syncytialization process leads to insufficient fetal nutrition and severe pregnancy complications. Syncytia formation is induced by the interaction of the surface glycoprotein of retrovital origin, Syncytin-1, with its receptor. Despite the significance of these processes, the details of cell fusion and trophoblast differentiation remain unk- nown. Furthermore, because of its uniqueness, the human placenta cannot be covered by animal models. As a result, research into human placental development, especially Syncytin-1-induced trophoblast cell fusion, is limited to in vitro trophoblast models. These models include primary trophoblast cell cultures and trophoblast cell lines, which can be obtained by immortalizing cell cultures or extracted from trophoblast tumours. Dedifferentiated trophoblast stem cell cultures were also established. The most recent approach, however, involves the direct reprogramming of dermal...
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Visualization of SDF Based Scenes
Fusek, Petr ; Karas, Matej (referee) ; Milet, Tomáš (advisor)
Pole znaménkových vzdáleností (Signed Distance Fields, SDF) poskytuje alternativní metodu popisu 3D povrchů. Povrch je reprezentován funkcí SDF, která vrací vzdálenost k nejbližšímu bodu povrchu. Tyto funkce mohou být kombinovány pomocí technik podobných konstrukční geometrii pevných těles (Constructive Solid Geometry, CSG). Nicméně, algoritmy vrhání paprsků (ray-casting), které se běžně používají pro vizualizaci těchto modelů, nejsou dostatečně škálovatelné pro vykreslování velkých a složitých scén s mnoha SDF objekty v reálném čase. Tato práce, inspirovaná hrou Dreams a technologií GigaVoxel, představuje datovou strukturu pro reprezentaci a vytváření 3D modelů pomocí zmíněné SDF-CSG metody spolu s technikou vykreslování v reálném čase schopnou vykreslovat scény s velkým počtem těchto objektů pomocí datové struktury Sparse Voxel Octree (SVO), vyhodnocované na GPU v reálném čase. Vykreslování využívá techniky úrovně detailu (Level Of Detail, LOD) a algoritmus ořezávání podle viditelnosti (view frustum culling) k výběru viditelných SDF bloků s úrovní detailů úměrnou vzdálenosti od kamery. Aplikace vyvinutá v jazyce Rust s využitím grafického API wgpu umožňuje vytvářet tyto SDF modely a demonstruje představené vykreslovaní techniky. Tato aplikace by mohla sloužit základ pro budoucí vývoj jednoduchého 3D nástroje pro umělce, kteří hledají alternativu tradičního polygonálního modelování.
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Supporting processing of tomographic data for 3D Slicer
Dašek, Filip ; Harabiš, Vratislav (referee) ; Čmiel, Vratislav (advisor)
Thesis summarize available softwares for visualization and segmentation of medical data. Main focus is on open source software 3D Slicer, where all main modules and functions for processing and segmentation of 3D images are described. The reader is also acquaint with posibility to create new modules and function in Python. In practical part of thesis new modul is created. Modul is focused on fast and effective segmentation of heart and their parts by using watershed method. Part of the module are tools for preprocessing of CT images and automatic post-processing. GUI was implemented and created with QT designer. Thesis containts testing and presenting segmented data. Segmentation by presented modul generaly achieves better results then options offered by 3D Slicer. In the last part of thesis is presented proposal for usage of supporting funtions for fast and efective segmentation of heart and his parts.
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Webová aplikace pro prodej 3D modelů
Novák, Tomáš
Novák, T. Web application for the sale of 3D models. Bachelor thesis. Brno: Mendel University, 2020. Theses focuses on the design and implementation of a web application for the sale of 3D models. The PayPal API is implemented to accept payments online and models are available for download immediately after payment. Due to their size in the browser, model files and their photos are divided into many small parts and gradually uploaded to the server, where these parts are merged back into their original form. The project was created due to the lack of an optimal solution to the issue.
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Scientific reconstruction of the fossil marine amniots
Cettl, Karel ; Mazuch, Martin (advisor) ; Ekrt, Boris (referee)
To create a good scientific reconstruction is important artistic skills and knowledge of history painting of prehistoric animals, and also knowlages in the anatomy, zoology, palaeontology, palaeoecology and also biomechanics. Reconstruction It stands on the borderline between art and science. Our view on the fossil marine Amniotes change over time with advancing skeletal findings, and also changed a scientific reconstruction. Although the actual outputs, such as reconstruction and in particular 3D models can explain a number of new or unexplained informations about this group. A reconstruction expert can not only beautify their actions, but also enthance scientific knowledge, or even to outline a new direction for further research. Keywords: Scientific reconstruction, fossil marine amniotes, adaptation, anatomy, evolution, palaeoecology, biomechanice, 3D models, trends.
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