<p>The goal of this project is to implement a system to analyse an audio signal containing speech, and produce a classifcation of lip shape categories (visemes) in order to synchronize the lips of a computer generated face with the speech. </p><p>The thesis describes the work to derive a method that maps speech to lip move- ments, on an animated face model, in real time. The method is implemented in C++ on the PC/Windows platform. The program reads speech from pre-recorded audio files and continuously performs spectral analysis of the speech. Neural networks are used to classify the speech into a sequence of phonemes, and the corresponding visemes are shown on the screen. </p><p>Some time delay between input speech and the visualization could not be avoided, but the overall visual impression is that sound and animation are synchronized.</p>

<p>Face detection is a classical application of object detection. There are many practical applications in which face detection is the first step; face recognition, video surveillance, image database management, video coding. </p><p>This report presents the results of an implementation of the AdaBoost algorithm to train a Strong Classifier to be used for face detection. The AdaBoost algorithm is fast and shows a low false detection rate, two characteristics which are important for face detection algorithms. </p><p>The application is an implementation of the AdaBoost algorithm with several command-line executables that support testing of the algorithm. The training and detection algorithms are separated from the rest of the application by a well defined interface to allow reuse as a software library. </p><p>The source code is documented using the JavaDoc-standard, and CppDoc is then used to produce detailed information on classes and relationships in html format. </p><p>The implemented algorithm is found to produce relatively high detection rate and low false alarm rate, considering the badly suited training data used.</p>

<p>This thesis develops an algorithm for tracking the boundary of an airbag throughout an image sequence. The algorithm is designed to work even if various problematic features, e.g. objects in the background, are present in the image. The work is built on an existing commercially available image processing and analysis suite targeted at the automotive industry. The software suite runs on standard PC hardware. </p><p>Firstly, improvements to the airbag tracking algorithm already available in the suite are considered. Testing reveals that these measures are not sufficient to overcome the problems posed by the problematic image sequences. </p><p>A new tracking algorithmis then proposed. It consists of a Canny edge detector, optional steps to enhance feature detection by removing edges in the background and edges interior to the boundary of the airbag and finally an active contour. The role of the active contour is to produce a closed curve while imposing smoothness constraints on the detected boundary. The active contour is in each frame initialized by linearly extrapolating the contour from previous frames. </p><p>The algorithm works very well and it is fast enough to run on slower machines than was initially targeted.</p>

<p>Technical systems of today are often complex and integrated. If a fault occurs, the consequences can be disastrous both for the system itself and its surroundings. To maintain the operation and the security it is necessary to have a surveillance system which can detect a fault in an early stage.</p><p>In this thesis two structural methods for fault isolation analysis are discussed. The result from the studied algorithms shows what fault isolation properties a diagnostic model is expected to have. If the isolability is not good enough, it also gives information on where further modelling needs to be done. </p><p>To base a comparison of the two structural analysis algorithms on, four criteria are defined concerning for example realizability of residuals and time complexity. One interesting part of the methods is how dynamic models are handled. It is shown how differential constraints can end up in differential cycles which implies calculatory problems and what effects structural differentiation has on a system. </p><p>The algorithms have been tested on an application from the research training network DAMADICS. The result shows how different types of input models in this case give the same result.</p>

<p>Den kraftiga ökningen av bredbandsuppkopplade hem världen över har lett till ett stort användande av s.k. webradio. Miljontals användare lyssnar dagligen på de tiotusentals tillgängliga webradiostationerna. Webradio är ett sätt att via Internet och TCP/IP sända radio. Oftast används de populära MP3-formatet men nya bättre standarder håller på att etableras. Tyvärr är man idag hänvisad till att lyssna på webradio via sin hemdator. Det är både krångligt och tar lång tid innan man kan börja lyssna, en rad program måste installeras och man måste leta på Internet för att hitta en station man vill lyssna på. Utbudet är dock enormt varför detta inte är en temporär fluga utan någonting som kommit för att stanna! Det här examensarbetet har gått ut på att i en liten, billig elektronisk krets implementera en MP3-baserad webradio. Rapporten ger en överblick över de olika komponenterna som krävs samt hur jag praktiskt löst de olika problem jag ställts inför. Tyvärr blev det inte implementerat i en enda krets utan i två, detta på grund av att tekniken som används är så pass ny att ingen stabil utvecklingsmiljö fanns att tillgå vid projektets start.</p> / <p>The large increase of broadband connections in the world has lead to a rapid spread in the use of web radio. Millions of users listens every day to the many thousands available stations on the Internet. Web radio is a way to broadcast radio over the Internet. The most popular format to code the media is by use of MP3, but newer and better methods are on there way. Today you have to use a personal computer to listen to Web radio. This is both time consuming and a potential source of technical frustration. You have to install several programs and then search the Internet to find a station to listen to. Despite the hassle Web radio offers such a variety of music genres to give it a solid future. The objective of this thesis is to give an overview of the work I have done and the problems I have run into, implementing an MP3-based Web radio receiver in a small inexpensive electric circuit, completely independent of a personal computer. This report gives an overview of the different problems I have been faced to during my work. Due to the lack of stable development environment at the time of the programming, I was unable to implement my solution on one circuit and had to use two circuits.</p>

<p>Detta examensarbete har utförts på och i samarbete med ITN, Institutionen för Teknik och Naturvetenskap, vid Linköpings Universitet. Problemställningen härrör från tidigare projektsamarbete mellan Linköpings Universitet, Telia AB och Ericsson. Uppgiften består i att ta fram en optimeringsalgoritm som använder sig av ett nytt angreppssätt genom att försöka minska osäkerheten på indata.</p>

<p>In today's video delivery and broadcast networks, issues of copyright protection have become more urgent than in analog times, since the copying of digital video does not result in the decrease in quality that occurs when analog video is copied. </p><p>One method of copyright protection is to embed a digital code, a"watermark", into the video sequence. The watermark can then unambiguously identify the copyright holder of the video sequence. Watermarks can also be used to identify the purchaser of a video sequence, which is called "fingerprinting". </p><p>The objective of this master thesis was to implement a program that would insert watermarks into video sequences and also detect if a given video sequence contains a givenwatermark. </p><p>The video standard I chose to use was the H.264 standard (also known as MPEG4 AVC) as it offers a significant efficiency improvement over the previous video compression standards. </p><p>A couple of tests that can be considered representative for most image manipulations and attacks were performed. The program passed all tests, suggesting that the watermarking mechanism of this thesis can be expected to be rather robust, at least for the video sequence used. By looking at the watermarked video sequences and comparing them to the originals, or measuring the signal to noise ratio, one can also see that the watermarks are unobtrusive. The execution times were also measured. Compared to coding and decoding a H.264 video stream, the time it takes to insert and extract watermarks was much less. Calculating a threshold takes roughly double the time as decoding the sequence, though.</p>

<p>Examensarbetet har genomförts på SB Truck AB i Vreta Kloster. Tyngdpunkten i arbetet var att filma tillverkningen av en ståstaplartruck,för att sedan analysera tillverkningsmetoderna och räkna fram den totala tiden för tillverkningen av en typ av truck. I studien ges förslag på förbättringar av tillverkningsmetoderna. Förslagen berör främst huvuddelarna i produktionen som är mast-, chassi- och gaffelvagnstillverkning. De förslag på förändringar som är viktigast är följande: </p><p>- Kontrollera vilka svetsfogar som verkligen behöver slipas. </p><p>- Se till att mastbalkarna som köps in håller den tolerans på rakhet som krävs. </p> / <p>This thesis has been carried out at SB Truck AB in Vreta Kloster. The emphasis of the project was to capture the manufacturing of a forklift on tape, to be able to analyse the manufactoring methods and calculate the total time of manufactoring. The project contains suggestions for improvements of the manufactoring methods. The suggestions mainly deals with the vital parts in the production process of the forklift. The most important suggestions are: </p><p>- Determine which of the weldingjoints that really needs to be grinded.</p><p>- Make sure that the purchased girders reaches the required tolerance level of straightness.</p>

<p>We are working on the development and design of an approach to agents that can reason, react to the environment and are able to update their own knowledge as a result of new incoming information. In the resulting framework, rational, reactive agents can dynamically change their own knowledge bases as well as their own goals. An agent can make observations, learn new facts and new rules from the environment, and then update its knowledge accordingly. The knowledge base of an agent and its updating mechanism has been implemented in Logic Programming. The agent’s framework is implemented in Java. </p><p>This aim of this thesis is to design and implement an architecture of a reactive, rational agent in both Java and Prolog and to test the interaction between the rational part and the reactive part of the agent. The agent architecture is called RR-agent and consists of six more or less components, four implemented in Java and the other two are implemented in XSB Prolog. </p><p>The result of this thesis is the ground for the paper “An architecture of a rational, reactive agent” by P. DellAcqua, M. Engberg, L.M. Pereira that has been submitted.</p>

<p>Förstudiens syfte var att kartlägga användarbehov kring ROE inom svenska Marinen och ta fram stöd och hjälpmedel för att underlätta ROE-arbetet. I kartläggningen medverkade personal från olika staber, förband och skolor inom Försvarsmakten. Flertalet deltog sedan också i det iterativa utvecklingsarbetet. </p><p>Tre användargrupper urskiljdes; Stabs- och fartygspersonal samt personal under utbildning. Några av de svårigheter som identifierades; Tolkningsskiljaktigheter mellan stabs- och fartygspersonal. ROE-arbetet ger ett administrativt merjobb för stabs- och fartygspersonal. Det finns inte tid eller resurser att öva ROE på ett realistiskt sätt med lämplig upptrappning av hotnivå. Det bedrivs ingen specifik ROE-utbildning vid Försvarsmaktens skolor eller centra. </p><p>Utvecklingsarbetet bedrevs parallellt med kartläggningen och involverade stabs- och fartygspersonal. Efter ett antal utvärderingar med användare kunde tre koncept för stöd och hjälpmedel ges. För att öka förståelsen och visualisera koncepten har tre demonstratorer skapats. Koncepten har fått arbetsnamnen;</p><p>- ADMIN - Administrativt stöd för ROE-hantering.</p><p>- FARTYG - Utbildningshjälpmedel för fartygsledning och eventuellt skolor.</p><p>- STAB - Stöd för framtagning av ROE-profil.</p><p>Författarna rekommenderar FOI att fortsätta utreda ROE-arbetet inom Försvarmakten och även internationellt samt vidareutveckla de tre föreslagna koncepten. För att skapa en gemensam grund för sin personal bör Försvarsmakten hålla seminarium och utbildning inom ROE och tydligare definiera ansvarsförhållanden och begrepp.</p>