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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
321

Nvrh a vroba optick©ho 3D scanneru / Construction and production of 3D optical scanner

BÄhnek, David January 2020 (has links)
The diploma thesis is focused on an optical method for 3D scanning. There is selected photogrammetry for creating 3D models. In the practical part, a mechanism for automatic photo capture is designed and manufactured and 3D printed with using a digital camera, Arduino microcontroller and stepper motors. There are proposed two methods of capturing photographs with which digital twins of reference objects are created. The result of the work is a functional 3D scanner. The next are evaluated used methods as well as the production costs and the time required by the operator when creating a digital copy of the object is listed.
322

Evaluation of open source web vulnerability scanners and their techniques used to find SQL injection and cross-site scripting vulnerabilities / Evaluering av öppen källkod sårbarhetsskannrar för webbapplikationer och dess tekniker för att finna SQL injection och cross-site scripting sårbarheter

Matti, Erik January 2021 (has links)
Both for its simplicity and efficiency to search for the most critical security vulnerabilities that could exist within a web application, a web vulnerability scanner is a popular tool among any company that develops a web application. With the existence of many different scanners that are available to use, one is unlikely the same as the other and the results attained when evaluating these scanners in relation to each other are often not the same. In this thesis, three different open source web vulnerability scanners are evaluated and analysed based on their ability to find SQL injection and cross-site scripting vulnerabilities. The scanners were used on several open source deliberately broken web applications that acted as benchmarks. The benchmarks that caused much diversity in the results from the scanners were further investigated. When analysing the scanners based on the results, both the actual results were analysed on what caused the diversity but most of all the source code of the scanners were explored and investigated. It could be found that the techniques used by the scanners were essentially similar but contained several minor differences that caused the diversity in the results. Most differences were dependant on the variation of the predefined payloads injected by the scanners, but it could also be found that the approaches used to determine if a vulnerability was detected or not could vary as well. The finalised result concluded in a report that reveals and demonstrates the different approaches that any web vulnerability scanner could use and the limitations of them.
323

Senzorický systém robotu Minidarpa / Minidarpa robot - senzoric subsystem

Sedlák, Luboš January 2010 (has links)
This master’s thesis describes a sensorial subsystem of a mobile robot. The thesis mentions the structure and a basis of the satellite navigation. There are also described each systems and visualization techniques as e. g. WGS 84, including also other systems for specification of more accurate position on the Earth (EGNOS, WAAS and others). This thesis describes closely also a differential GPS and the corrections. For the purposes of the thesis there has been assembled GPS software for a fundamental and a remote station. There have been chosen and used modules for receiving a GPS signal and wireless modules for their communication. There are also used outcomes from the project of the Open Street Map in the thesis. Results of this project are described in details, decoded, adjusted and converted into RNDF file. At the end of this thesis there has been composed a function of the program for portable camera which works on principle time of flight. This portable camera is dedicated to look for immediate barrier and also for 3D space view in front of the robot. This thesis also including the process how the power source has been built up for this portable scanner.
324

Binokulární vidění / Binocular vision

Brichta, Tomáš January 2012 (has links)
In this work I have been briefed by physiology of binocular vision for acquisition of three-dimensional perception from two-dimensional images using special glasses. At first I described optical organ, after it I described physiology of binocular vision. In the next part of my work I described stereoscopic imaging technology and their advantages and disadvantages. In the next part of this work I have designed method for measuring ideal distance between cameras for scanning and projection of stereoscopic image using program Inition StereoBrain Calculator. After scenes design I have collected visual data for creating 3D videos. This videos were been projected to the group of the viewers. Data from the viewers were been analyzed afterwards.
325

Výroba prototypu automobilu s využitím moderních metod a technologie CAD/CAM / A car prototype manufacture using modern methods and CAD/CAM

Horák, Aleš January 2010 (has links)
The project developed under the engineering studies, solves the problem of production of a prototype car using modern technology, reverse engineering and CAD / CAM. Based on the literary study of the issue, was designed process of digitization of the physical model of car, including the treatment and processing of data. Follow-up step was to verify the production of the additive rapid prototyping technology - FDM method. Verification of the results was performed on a vertical milling cantilever FV 25 CNC with control system Heidenhain iTNC 530 using a cutting strategies by PowerMILL CAM software. At the end of the resulting models edit as necessary.
326

Zvýšení plnicí účinnosti zážehového motoru na CNG o výkonu 140 kW / Increase of Charging Efficiency of 140kW CNG Engine

Hadrava, Martin January 2013 (has links)
The master’s thesis is focused on flow analysis work filling in turbocharged CNG engine. The research method is reverse engineering. The intake canal is casted and than scanned by 3D Scanner ATOS. The CAD model is created in program Creo Parametric 2.0. In the created interactive model is simulated flow in the CFD program Star CCM +. The air intake system is modified for increasing the charging efficiency of the engine.
327

Laserový 2D skener / 2D laser scanner

Tomek, Tomáš January 2016 (has links)
This thesis deals with design and implementation of extension module that enables 2D scanning with single-point interferometer. Afterwards is here solved question of software, which output data can be visualized in ModalVIEW by ABSignal company. My work also contains an overview of LDV sensors and scan systems, which are used to laser beam steering.
328

Systém pro sdílení skenerů po síti / System for Sharing Scanners over Network

Richter, Martin January 2015 (has links)
The purpose of this master's thesis is creation of a system capable of sharing scanners over computer network. The target scanner interfaces are TWAIN and WIA on Microsoft Windows operating system, and SANE on GNU/Linux. C++ programming language, Boost libraries and Qt framework were used to implement the programming part of this work. Several smaller helper libraries were implemented that are useful even outside this work, most notably TWAIN++ framework. The resulting system enables the user to share scanners over network, and scan using any of the aforementioned interfaces.
329

Multimedia unter Linux

Heik, Andreas 21 March 2000 (has links)
Mit der Verbreitung von Linux als Desktopsystem steigen auch die Anforderungen des Nutzers an multimediale Fähigkeiten wie z.B. das Anhören eines digitalisierten Musikstückes, die Einbindung einer Digitalkamera in die Bildverarbeitung, die Nutzung einer Radio/TV-Karte oder gar das Bearbeiten eines kleinen Videofilms.
330

Mikrospiegel basierte 3D Scannersysteme für Reverse Engineering Lösungen in einem weiten Skalenbereich

Aswendt, Petra January 2012 (has links)
Aus der Einleitung: "In der Historie erforderte die komplette dreidimensionale Aufnahme eines Objektes mittels Streifenprojektion einen hohen Zeitaufwand aufgrund der Realisierung der zeitlichen Abfolge von Streifensequenzen mit analogen Mitteln, mehrere Sekunden sind der übliche Standard für eine 3D Aufnahme. Damit einher geht die Notwendigkeit des während der Aufnahmezeit ruhenden Objektes. Das bedeutet Einschränkungen für eine Vielzahl von Anwendungen insbesondere bei dynamischen Prozessen und lebenden Objekten. Neue Möglichkeiten eröffneten sich mit der Einführung digitaler Lichtmodulatoren."

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