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QR code detection under ROS implemented on the GPU
Hurban, Milan ; Věchet, Stanislav (referee) ; Krejsa, Jiří (advisor)
Tato diplomová práce se zabývá vývojem a implementací algoritmu pro detekci QR kódů s integrací do platformy ROS a výpočty běžícími na grafické kartě. Z rešerše současně dostupných nástrojů a technik je vybrán vhodný postup a algoritmus je napsán jako modul v programovacím jazyce Python, který je snadno integrovatelný do ROS. Ke zprostředkování výpočtů na vícejádrovém hardware, jako jsou grafické karty či vícejádrové procesory, je využita knihovna OpenCL.
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Detection, Localization, and Decoding QR Code in Image
Kałuża, Marian ; Juránková, Markéta (referee) ; Herout, Adam (advisor)
This thesis describes the QR Code detector based on detecting edge lines using Hough Transform and point-to-line parametrization. Generally, the presented method can be also used for detecting different types of matrix codes. This approach searches in the accumulated Hough space for evidence of the matrix code as one compound object. It detects parallel lines by finding a concurrent lines' image groups in the transformed space. It contrasts with the common approach which is first detect the lines and calculate the vanishing point afterwards, which omit much of the useful information stored in the Hough space which can be useful for the detection of vanishing points. The purpose of this thesis is a research of methods which can detect the QR Code in spite of rotation, perspective distortion or uneven illumination. The experimental evaluation shows that the presented algorithm is stable and accurate and is tolerant to high degrees of perspective deformation.
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User verification based on smart-phones
Bělík, David ; Malina, Lukáš (referee) ; Hajný, Jan (advisor)
The main aim of this diploma thesis is to get acquainted with the area of secure authentication and authorization of users in smartphones on the Android platform. Individual types of encoding, authentications, authentication devices and characteristics of QR codes are decribed in the chapters. In the practical part of this thesis the applications are created with an implemented authentication scheme, which is being developed at FEKT VUT in Brno. The client part of the application, that generates QR code, as well as the server part, that verifies the authenticity of the data, are set up.
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Security applications on the Apple iOS platform
Kolář, Michal ; Martinásek, Zdeněk (referee) ; Hajný, Jan (advisor)
This document deals with the security of iOS operating system. It describes applications which ensure the safety of the entire file system and private files of the user. It further describes mechanisms for authentication of the user and for credibility verification of third- party applications. The practical part is devoted to the installation of the development environment Xcode and introduces the reader to its work environment. The practical part is focused to create an application which will implement a security protocol. Also include work with another additional libraries which will be needed to create an application. Output application will be generated QR code with all required values of cryptographic protocol
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Barcodes Reading Library
Novohradský, Petr ; Přibyl, Bronislav (referee) ; Kubíček, Radek (advisor)
This work deals with the decoding of different types of barcodes in the image. Selected types of bar codes are described in detail. Presents an approach to decode linear and matrix bar codes. The practical part deals with the design and implementation of software library for reading selected types of bar codes in Java.
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Barcode recognition system
Pribula, Wojciech ; Richter, Miloslav (referee) ; Petyovský, Petr (advisor)
This thesis describes barcodes which are used in postal services. Specifically, it is concerned with Intelligent Mail Barcode, the GS1-128 code, the C128 code of Ceska posta (Czech Postal Services) and the QR code. The thesis attempts to analyze methods of encoding information into barcodes and error detection algorithms used for error correction during the decoding processes. Most importantly, there is described Reed-Solomon error correction in the QR code. There are presented and evaluated different methods of code detecting which are suggested by authors of various academic articles. The thesis also describes the method of creating test sets of images and proposed appearances of the scanning scene. Additionally, there are described algorithms for detection and decoding barcodes GS1-128, C128 and IMB in the image which was created during the work on this thesis. Finally, there is the evaluation of the percentage success of algorithms.
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Embedded QR code generator with a graphic OLED display
Lakomý, Tomáš ; Krajsa, Ondřej (referee) ; Hanák, Pavel (advisor)
This master’s thesis deals with coding information and QR codes generating. There is described operation principle of QR codes for this purpose, and design of the equipment. This device is able to encode the information received through the serial port and display it in the QR code on the OLED display. Microprocessor is part of the device, so there is outlined the procedure for programming and testing equipment.
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Advanced QR-Code reader for Android
Kubík, Martin ; Přinosil, Jiří (referee) ; Šmirg, Ondřej (advisor)
The aim of this diploma thesis was to created application for detection and decoding QR codes using devices with the Android Operating System. For preprocessing of the visual field camera is used OpenCV library. Designed preprocessing string searches a perspective transforms possible QR codes. This is suppressed a shape distortion QR code that would otherwise reduce the successful decoding. At the same time the preprocessing string applied unsharp mask, which reduces the effect of motion blur image caused by the camera motion. Thus preprocessing scene is finally decoded using ZXing library. Described manner it is possible to achieve a higher success rate detection and decoding of QR codes than other conventional QR readers.
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