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Avståndsvarnare till Mobiltelefon
University West, Department of Economics and IT.
2011 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
##### Abstract [en]

This report describes a study, description and testing of parts to an application adapted to the operating system Android. The application is supposed to measure the distance to a car ahead. Apart from distance measurements the ability of the application to calculate its own speed with the help of GPS is tested. From these two parameters, speed, distance and some constants the theoretical stopping distance of the car will be calculated in order to warn the driver if the car is too close to the car ahead in relation to its own speed and stopping distance.

Tests were conducted on the different applications that were programmed and the result showed that the camera technique in the mobile phone itself limits the maximum distance of the distance measurement application. The max distance the tests in this thesis revealed was approximately 5 meters. The measurement done to the GPS speed calculating application showed that the application was more accurate than the speedometer in the test car.

The result of this thesis was that if all the parts were to be put together to a single application the maximum speed that it could be used with some functionality was 13,8 kilometers/hour assuming that the car ahead is at a standstill and the camera on the mobile phone is in a straight line from the license plate.

##### Abstract [sv]

Denna uppsats beskriver en studie, utveckling och testning av delar och teknik till en applikation anpassad till operativsystemet Android. Applikationen skall kunna mäta avståndet till framförvarande bil. Utöver avståndsmätning så testas applikationens förmåga att kalkylera sin egna hastighet med hjälp av GPS. Utifrån dessa två parametrar, hastighet och avstånd samt några konstanter skall den teoretiska stoppsträckan kunna räknas ut för att kunna varna om fordonet är för nära farmförvarande bil i förhållande till sin egna fart..

Tester utfördes på de olika applikationerna som programmerades och resultatet visade att tekniken i sig sätter stopp för att kunna mäta avståndet till nummerplåten på ett längre avstånd än ca 5m. Mätning av hastigheten var mer noggrann än hastighetsmätaren i bilen.

Resultatet blev att om alla delar sattes ihop till en enda applikation så skulle den i bästa fall kunna användas i maximalt 13,8 km/h förutsatt att framförvarande bil är stillastående, och att kameran från telefonen är i en rak vinkel mot framförvarande nummerplåt.

2011. , 31 p.
##### Keyword [en]
Image recognition, Android, OpenCv, Computer Vision
##### Keyword [sv]
Bildigenkänning, OpenCv, Android, Computer Vision
##### National Category
Computer Engineering Software Engineering
##### Identifiers
OAI: oai:DiVA.org:hv-3480DiVA: diva2:429117
##### Subject / course
Computer enigeering
(Swedish)
Technology
##### Examiners
Available from: 2011-07-07 Created: 2011-07-03 Last updated: 2011-07-07Bibliographically approved

#### Open Access in DiVA

##### File information
File name FULLTEXT01.pdfFile size 2688 kBChecksum SHA-512
f2b8cb317167c63dfe5a2aef530941d97526d5951192d7e269903901810ece356ecac320c11303ffc9c4b24c722252c7bfae76f81807fc2f14ba8f928f2aa5a5
Type fulltextMimetype application/pdf

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Johansson, Joakim
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Department of Economics and IT
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Cite
Citation style
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