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Camera calibration
Opravil, Jan ; Babinec, Tomáš (referee) ; Richter, Miloslav (advisor)
Imperfection of some lenses used in industrial cameras is distracting. This thesis is concerned with the calibration of cameras with geometric barrel or cushiontype distortion. In the calibrating process is used a function which approximates real lens distortion. To calculate the coefficients of this function the straight line sections in the distorted image are used. Those detected lines play the key role and they ought to have the greatest possible information bias. To enhance the quality of detection are chosen some methods of preprocessing. The algorithms thus created are tested first on an artificially generated calibers and later on real ones. The program is written in C and is using some of the functions of the OpenCV library.
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Measuring positions of objects using a pair of cameras
Sláma, Adam ; Říha, Kamil (referee) ; Kříž, Petr (advisor)
The thesis focuses on acquiring spatial information of a digital image. Simple measuring device consists of two static cameras and of a created software, which is able to find the coordinates of measured object in the sensing area with certain accuracy due to the reference coordinate system. The program was formed in the development environment Microsoft Visual Studio 2015 using package of OpenCV libraries in C++ programming language. The program is based on calibration of image, determination of the global and pixel coordinates and on triangulation method.
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3D model from multiview
Zemčík, Tomáš ; Klečka, Jan (referee) ; Richter, Miloslav (advisor)
Reconstruction of 3D model from multiple view images allows us to perform a contactless measurement of real world objects. This work contains theoretical and mathematical background necessary for understanding problems of 3D reconstruction. It also proposes possible hardware and software solutions for the task of measuring a hood with EEG sensors while on patients head.
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Accuracy Analysis of Astronomical Positioning Results
Jalovecký, Martin ; Kratochvíl,, Radim (referee) ; Machotka, Radovan (advisor)
This diploma thesis is focused on the analysis of results accuracy of astronomical positioning. It describes observation methods and the latest surveying systems used in geodetic astronomy. Further in the thesis there is the description of surveying system MAAS-1. Subject of the elaboration is the data obtained by measuring with this system. Testing is focused on digital camera. There is also an analysis of the results of geographical coordinates, depending on the accuracy of determining the angled pixel size and also on the accuracy of the input coordinates.
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Calibration of Robotic Workspace
Uhlíř, Jan ; Veľas, Martin (referee) ; Kapinus, Michal (advisor)
This work is concerned by the issue of calibrating a robotic workplace, including the localization of a calibration object for the purpose of calibrating a 2D or 3D camera, a robotic arm and a scene of robotic workplace. At first, the problems related to the calibration of the aforementioned elements were studied. Further, an analysis of suitable methods for performing these calibrations was performed. The result of this work is application of ROS robotic system providing methods for three different types of calibration programs, whose functionality is experimentally verified at the end of this work.
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Processing of Stereoscopic Video Sequence
Hasmanda, Martin ; Šmirg, Ondřej (referee) ; Říha, Kamil (advisor)
The main goal of this master’s thesis was get up used methods for observation the stereoscopic scene with one couple of cameras and find out good solving for processing these resulting pictures for two-view and multiple-view autostereoscopic displays for three-dimensional perception. For methods for acquisition video was introduced two methods. They were method “Off-axis” with parallel camera axis and method “Toe in” with intersections axis. For fit method was choice the method named as “Off-axis“. It was not produces the vertical parallax and in detail was in this work described principle of this method. Further were describe principles off used methods for three-dimensional perception namely from the oldest method named anaglyph after methods for viewing at autostereoscopic displays. The Autostereoscopic displays were main goal of this thesis and so their principles were described in details. For production the result image for autostereoscopic displays was used generation intermediate images between left and right camera. Resulting videos were acquisition for testing scene in created in 3D studio Blender, where was possible setting system of cameras exactly parallel axis. Then were introduce principles processing video where was extract from the couple of cameras where were connected to PC for help digitizing card and next time with two web cameras. Here is not guaranteed exact parallel axis system. Therefore this work try for real cameras achieve exactly parallel axis system by the help of transformations of frames with stereo rectification. Stereo rectification was solving with OpenCV libraries and was used two methods. Both methods work from principles epipolar geometry that was described in this work also in detail. First method rectifies pictures on the basis fundamental matrix and found correspondences points in two images of the scene and second method rectifies pictures from knowledge intrinsic and extrinsic parameters of stereoscopic system of cameras. In the end of this work was described application for implementation introduced methods.
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Uniform Marker Fields for Android
Salát, Marek ; Szentandrási, István (referee) ; Herout, Adam (advisor)
This thesis deals with a desing and an implementation of a detector for Uniform Marker Fields and a debugging appliaction for Android mobile devices. Implementation comes with alternativ methods in considiration of original solution, suitable for low-performance devices. The main goal of detector is find a position and a rotation of marker module or alternatively a position of the camera in real space. The resulting soulution can be also used as a library for the marker module detection or as a core for augmented reality based application using Uniform Marker Fields.
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Augmented Reality Using Video from a Stationary Camera
Lagová, Lenka ; Szentandrási, István (referee) ; Herout, Adam (advisor)
This thesis deals with the issue of creating applications of augmented reality. There are described types of augmented reality, problems associated with developing of applications of this kind. Also there is description of method for detection of moving objects from the record of stationary camera. The thesis deals with camera calibration using knowledge of scene geometry. Scene editor for scene geometry estimation is included in this work. Augmented reality is represented by physical simulations, where object from virtual reality interacts with detected objects and with objects defined in scene editor.
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Realization of camera module for mobile robot as independent ROS node
Albrecht, Ladislav ; Appel, Martin (referee) ; Věchet, Stanislav (advisor)
Stereo vision is one of the most popular elements in the field of mobile robots and significantly contributes to their autonomous behaviour. The aim of the diploma thesis was to design and implement a camera module as a hardware sensor input, which is independent, with the possibility of supplementing the system with other cameras, and to create a depth map from a pair of cameras. The diploma thesis consists of theoretical and practical part, including the conclusion of results. The theoretical part introduces the ROS framework, discusses methods of creating depth maps, and provides an overview of the most popular stereo cameras in robotics. The practical part describes in detail the preparation of the experiment and its implementation. It also describes the camera calibration and the depth map creating. The last chapter contains an evaluation of the experiment.
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