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Measurement of Human Hand Geometric Parameters
Vanžurová, Anna ; Hrabec, Pavel (referee) ; Štarha, Pavel (advisor)
In practice, there is no easy way to obtain the size of the surface of a human hand. Therefore, this work deals with the search for a mathematical model determining the approximate surface of the hand. This model uses the basic geometric parameters of the hand obtained from her photograph. Since it is necessary to obtain parameters from the image, compare the mathematical model with reality and verify its accuracy in terms of statistics, the work includes the theory of digitization of image information, 3D scanning and statistics.
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Measurement and product inspection using 3D manipulator
Klimeš, Petr ; Čala, Martin (referee) ; Beneš, Petr (advisor)
In thesis there is research of 3D scanning methods in order to create method for contact and non-contact scanning of windsurfing boards. There is also research of measuring accuracy and repeatability of 3D manipulators. Repeatability is then measured for given manipulator and contact and non-contact sensors are tested for scanning windsurfing boards. Measured data is processed and compared to original reference data.
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Development of the oronasal facial region in children aged 7-17 years: longitudinal study
Jungvirtová, Tereza ; Velemínská, Jana (advisor) ; Moslerová, Veronika (referee)
This thesis is based on longitudinal monitoring of developmental changes of the oronasal region in a group of children from 7 to 17 years. Growth and shape changes, variability and sex dimorphism were monitored using 492 3D facial models of 40 boys and 47 girls. These models were obtained by yearly scanning children aged 7 to 12 years and 12 to 17 years. The Vectra 3D optical scanner was used to obtain the models and data were evaluated using classical and geometric morphometry methods (T-test, DCA, Per vertex T-test and Principal component analysis). The results of the analyses were visualized using superprojection color maps of average faces and significance maps that show statistically significant regions of oronasal region changes. During the period under review, the growth of the oronasal region is evident in both girls and boys. The most intense growth occurred in the area of the nasal spine in both sexes, so there was a lengthening of the nose. Overall, the oronasal region extended and expanded to acquire a more convex shape. Growth intensity increased in girls from 10 years and in boys from 11 years. Sexual dimorphism was pronounced up to 11 years, between 12 and 13 the differences were not as pronounced as in the previous age categories, and these changes began to increase again from 14...
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Harris corner detector
Květný, Michal ; Martišek, Dalibor (referee) ; Procházková, Jana (advisor)
This bachelor’s thesis deals with application of Harris corner detector for finding corner points in images and models. This thesis also contains an implementation of the algorithms in Python programming language. Programs are tested on real images captured by camera and models created by 3D scanning.
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Design of replicated production of the selected part and verification of shape and dimensions using optical 3D scanning methods
Šrenk, Jakub ; Fiala, Zdeněk (referee) ; Slaný, Martin (advisor)
This work is engaged in the prototype casting of resin with usage of reverse engineering technology and rapid protopyping. Surface quality and dimensional accuracy was optimized in a production process. The technology of 3D scanning, rapid prototyping, soft tooling and finishing methods is discussed in the theoretical part. Then in the practical part there is analyzed manufacturing process of the selected component for replicated production. 3D scanning, additive technology, soft tools and surface finishing methods were used in the manufacturing process. In the last step, the dimensional accuracy is evaluated and also the technology for serial and piece production was chosen.
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Application of very thin matte coatings
Hruboš, David ; Mendřický, Radomír (referee) ; Koutecký, Tomáš (advisor)
This diploma thesis deals with matte coatings for optical 3D scanning. The aim of this thesis is to find a method of spraying the mixture of TiO2 and ethanol that would provide layer thickness beyond the measurable range of the 3D scanner. A spray gun allowing deposition of atomized mixture was design. The coatings created by this gun and by airbrush gun, which is commonly used for this purpose, were compared. The matting effect, thickness and the influence of used TiO2 particles were investigated in the coatings. The paper shows method of applying coatings that ensure sufficient matting of the surface for scanning purposes, and simultaneously have thicknesses that should not affect scanning results.
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Proposal for Control of Manufacture Holders of the Front Wheel for Formula Student TU Brno Racing
Vašek, Lukáš ; Sliwková, Petra (referee) ; Sedlák, Josef (advisor)
This thesis deals with the design and production of wheel control holders for the right front wheel of the formula Dragon 4 of TU Brno Racing team. In the theoretical part, the Formula Student competition is described, including the steering holders themselves and description of their function and location. Later the analysis of aluminium and its alloy was made, including description of the CERTAL material of which the holders were made. The practical part includes the design of prototype holders in the Autodesk Inventor CAD software, the design and application of machining strategies in the PowerMILL CAM software. Further, the practical part includes production on milling machines at the MCV 754 QUICK and DECKEL MAHO DMU 50 machining centre. At the end, the dimensional analysis of the part is performed, manufactured holders were compared to the CAD model of the given components and the technical and economical evaluation of the production was made.
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Automated design and 3D printing of prototypes for urban engineering
Krutáková, Anna ; Vořechovská, Dita (referee) ; Podroužek, Jan (advisor)
This bachelor thesis deals with automated design and 3D prototype printing for urban engineering. In the first part, there is a general definition of 3D printing, including development and overview of basic technology and materials. It also follows the focus on certain measurement methods and the creation of 3D models. In the second part, the thesis focuses mainly on the use in the building industry and it discusses related topics such as the automatic optimization of the external elements of building elements or objects(shape), the internal topology of these building elements (fill) and the possible inspiration from organic structures. There is also distinguished between terrestrial applications focusing on the production of prefabricated building components and implementation at site. Extraterrestrial autonomous applications discuss the possibilities this technology for colonizing the Moon or Mars. This thesis presents the results of a unique assessment of the current state of the art in the field of applicability of 3D technology for additive production in the context of urban engineering and demonstrates the associated advantages and open problems on many examples. Finally, the benefits of this technology are evaluated.
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Facial development in children 6 to 12 years old: longitudinal study
Tošovská, Hana ; Velemínská, Jana (advisor) ; Zedníková Malá, Pavla (referee)
This study is based on evaluative longitudinal data of facial development in a group of children from 6 to 12 years. The research used three-dimensional models of the faces of 18 girls and 15 boys that were scanned at yearly intervals. These models were used to follow development of the face and its particular areas including analysis of variability (PCA). Developmental changes were observed for each gender separately as well as for the development of sexual dimorphism. Results were visualized by using superimposed color maps of average faces of a particular age group and maps depicting the statistically significant differences in individual areas. The presented data exhibited growth in the face of both genders, while slightly bigger changes in the form of the face were observed in the boys' samples. For girls and boys the most intensive growth was found in the direction of the width and height of the entire face and the nose, especially in the direction of length. These changes took place throughout the whole studied period of growth, yet more intensive growth was evident for girls beginning at age 10 years and for boys from 11 years onward. Shape changes also occurred with age for both genders: the face gradually narrowed, the cheeks flattened and a more retruded position of the forehead...
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Analysis of Point Clouds Representing Surfaces of Engineering Practice
Surynková, Petra ; Voráčová, Šárka (advisor) ; Pokorný, Milan (referee) ; Lávička, Miroslav (referee)
Title: Analysis of Point Clouds Representing Surfaces of Engineering Practice Author: Petra Surynková Department: Department of Mathematics Education Supervisor: Mgr. Šárka Voráčová, Ph.D., Faculty of Transportation Sciences, Czech Technical University in Prague Abstract: The doctoral dissertation Analysis of Point Clouds Representing Surfaces of Engineering Practice addresses the development and application of methods of digital reconstruction of surfaces of engineering and construction practice from point clouds. The main outcome of the dissertation is a presentation of new procedures and methods that contribute to each of the stages of the reconstruction process from the input point clouds. The work is mainly focused on the analysis of input clouds that describe special types of surfaces. Several completely new algorithms and improvements of existing algorithms that contribute to individual steps of surface reconstruction are presented. New procedures are based on geometrical characteristics of the reconstructed object. An important result of the dissertation is an analysis of not only synthetically generated point clouds but above all an analysis of real point clouds that have been obtained from measurements of real objects. The significant contribution of the dissertation is also an...
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