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3D Graphics in Web Browser
Kuželová, Ludmila ; Kršek, Přemysl (referee) ; Španěl, Michal (advisor)
The thesis deals with the creation of a three-dimensional virtual view with the use of the new WebGL standard in combination with O3D javascript framework. The result is freely available web application which generates a virtual tour of sent series of photographs. Afterwards, the photographs are processed by the server, which on the basis of found corresponding points creates 3D scene. The application is based on a freeware application Bundler [40] which is used for identifying 3D points in uploaded photographs and related cameras (the places from which the photographs were taken). Bundler outputs are processed by Jetty web server with the use of Java script. At this point, all data required for the creation of a view are gathered. The display of the final result is then realized via HTML5, CSS, WebGL and Javascript using O3D.
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3D Scene Reconstruction from Images
Hejl, Zdeněk ; Kršek, Přemysl (referee) ; Španěl, Michal (advisor)
This thesis describes methods of reconstruction of 3D scenes from photographs and videos using the Structure from motion approach. A new software capable of automatic reconstruction of point clouds and polygonal models from common images and videos was implemented based on these methods. The software uses variety of existing and custom solutions and clearly links them into one easily executable application. The reconstruction consists of feature point detection, pairwise matching, Bundle adjustment, stereoscopic algorithms and polygon model creation from point cloud using PCL library. Program is based on Bundler and PMVS. Poisson surface reconstruction algorithm, as well as simple triangulation and own reconstruction method based on plane segmentation were used for polygonal model creation.
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Stereoscopic Face Images Matching
Klaudíny, Martin ; Kršek, Přemysl (referee) ; Zemčík, Pavel (advisor)
This thesis is dedicated to the problem of 3D face capture. A majority of current face capture systems exploits a pattern projection. The goal of thesis was to develop the 3D face capture system based on the passive stereo photogrammetry. The high-resolution images of a face are captured by one pair of the calibrated digital still cameras. The image pre-processing consists of the removal of lens distortion, rectification of image pair and face extraction. The stereo image matching is accentuated. Three different approaches to the stereo correspondence search are presented - the local technique, the global technique using a graph cut and the hybrid technique merging previous two. At last, the 3D model is reconstructed according to the found correspondence. The results show that the high-quality 3D face models can be obtained despite traditional difficulties with matching pattern-free face images. Also it is possible to keep the computational demands on the acceptable level, although the high-resolution images are processed.
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Interactive Human Tissues 3D Modeling by CT/MR Data
Satinský, Tomáš ; Štancl, Vít (referee) ; Kršek, Přemysl (advisor)
This work concerns / deals with theoretical analysis, design and implementation of system for creation three-dimensional computer models of human body tissues. These models will be created by computer tomography (CT) and magnetic resonance (MR) data. Output of medical apparatuses based on these principles is a three-dimensional raster, which is not good for visualization and making real models. For required tissues extraction are used automatic or semiautomatic methods, where is necessary an operation of a specialist. This work is concerned with human body tissues with linear structure such as veins and arteries, nerves, bone canals etc. These structures are problematic recognizable by automatic methods. Therefore is convenient an operation of a specialist, which is adept in human anatomy.
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3D Objects Reconstruction from Image Data
Cír, Filip ; Kršek, Přemysl (referee) ; Španěl, Michal (advisor)
This paper deals with 3D reconstruction of objects from image data. There is describes theoretical basis of the 3D optical scanning. Handheld 3D optical scanner setup is described composed of a single camera and a line laser whose position is fixed with respect to the camera. Set of image markers and a simple real-time detection algorithm are proposed. Detected markers are used to estimate position and orientation of the camera. Finally, laser detection and triangulation of points lying on object surface are discussed.
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Tooth Detection on Jaw 3D Computer Polygonal Model
Filip, Jan ; Šiler, Ondřej (referee) ; Kršek, Přemysl (advisor)
Aim of this bachelor thesis is a proposal and an implementation of a tool for the tooth detection on a 3D computer polygonal jaw model, which will allow to a user to obtain the shape of teeth on the jaw. This tool should to help in the stomatology. In the event of any inaccurary in the detection it will be possible to change certain parameters and methods, by which will be possible to influence the accuracy of detection. Program will import models in the STL format and subsequently will allow to the user to see the result of the detection in a browser. Teeth detection models will be possible to export single or together, in the STL format. The implementation language will be C++, compiler GNU C in distribution MinGW, toolkit to work with the 3D model will MDSTk and primarily its part VectorEntity. For imaging of thr 3D scene will be used OpenSceneGraph toolkit. Application will be developed primarily for MS Windows operating system but thanks to using GNU tools should be portable at the level of source codes to anothers operating systems.
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CAD System for 2D Drawing
Murín, Michal ; Chudý, Peter (referee) ; Kršek, Přemysl (advisor)
The Bachelor´s thesis is aimed at the design and creation of CAD system for 2D drawing. It introduces the use of computers in manufacturing and the advantages the use of computers brings, general definition of CAD systems and requirements imposed on them. The thesis contains the design of generated CAD system, and as a practical part it introduces implementation of the designed application. Finally it summarizes what has been achieved in developing and what could potentially be achieved in further expansion of the application in the future.
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Skeleton Extraction from Polygonal Meshes
Borek, Ondřej ; Kršek, Přemysl (referee) ; Španěl, Michal (advisor)
This bachelor's thesis deals with skeleton extraction from 3D objects. The presented technique for skeleton extraction from incomplete points cloud is based on ROSA (Rotational Symmetry Axis) method, while the searching for rotational symmetry axis was optimized. The method is resistant to missing data and is suitable for objects made from cylindrical parts and joints of that parts (for example human and animals bodies). In experiments, both the influence of object properties (for example missing data, chill mark, shape) and the influence of method's parameters were examined.
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