Search results for "Analyse"
showing 10 items of 1155 documents
Psychanalyse et histoire
2015
International audience
Reconstruction of 3D grain boundaries from rock thin sections, using an advanced polarised-light microscopy method
2017
Grain boundaries play a significant role in materials by initiating reactions and collecting impurities. Here we present FAGO (Fabric Analyser Grain boundary recOnstruction), a first step towards the automatic determination of three-dimensional (3D) grain boundary geometry using polarised light. The trace of the grain boundaries from 2D rock thin sections are determined primarily from data acquired using an automatic fabric analyser microscope and the FAME software (fabric analyser-based microstructure evaluation; Peternell and colleagues and Hammes and Peternell). Based on the Fabric Analyser G50's unique arrangement of nine differently oriented light sources the retardation can be determi…
Feasibility study of VoIP in 3GPP UMTS release 5 interworking with fixed networks
2003
Masteroppgave i informasjons- og kommunikasjonsteknologi 2003 - Høgskolen i Agder, Grimstad The Universal Mobile Telecommunications System (UMTS) is denoted as a 3rd generation cellular system and has been designed with the objective to be a system with global coverage. With improvement of bandwidth capabilities, the UMTS system has the ability to support real time multimedia services. The focus in this thesis is Voice over IP (VoIP) which enables a user to make phone calls in the packet switched network in UMTS. This thesis starts with a presentation of VoIP with the quality requirements related to a voice session. A voice conversation needs a guaranteed quality to satisfy the participants…
Wavelet-based video compression: A glimpse of the future?
2004
Masteroppgave i informasjons- og kommunikasjonsteknologi 2004 - Høgskolen i Agder, Grimstad Even though wavelet-based video compression has been an area of research for more than a decade, motion estimation and compensation has been considered complex and inefficient until recently. We have carried out a thorough investigation of existing research work in this field, and found that fundamental problem with wavelet-based temporal removal while obtaining highly scalability (the wavelet-properties of multiresolution structure in combination with embedded coding), has been solved by performing motion compensated temporal filtering within the wavelet domain of a overcomplete three-dimensional li…
An improved image processing chain for mobile terminals
2002
Masteroppgave i informasjons- og kommunikasjonsteknologi 2002 - Høgskolen i Agder, Grimstad Based on the proposal in the report by Tryggve Mikkelsen [Mikkelsen, 2001] this thesis investigates and discusses the implementation of a simplified image processing chain for modern mobile terminals. Previous work on image processing in this field of application has shown that the demosaicing operation, color space conversion and downsampling are resource demanding pre-processing operations. The simplification potential of the signal chain lies within the pictured scenario of using Bayer RGB from the image sensor directly as input to the compression scheme. By omitting these pre-processing operation…
Analysis of audio coding algorithms for networked embedded systems
2004
Masteroppgave i informasjons- og kommunikasjonsteknologi 2004 - Høgskolen i Agder, Grimstad Today there are many different audio coding algorithms, some of them standardized by the ITU, like G.711, G.726 and G.728, and several other codecs by other organizations like Fraunhofer (mp3) and Microsoft (WMA). All these algorithms differ in several important features, like speech quality, bit or compression rate, robustness, delay, sampling frequency, complexity and range of use. The past decade we have witnessed a great progress towards application of low-rate speech/music coders as well as computer related voice/music applications. Central to this progress has been the development of speech cod…
Expanding Convolutional Tsetlin Machine for Images with Lossless Binarization
2020
Master's thesis in Information- and communication technology (IKT590) Deep convolutional neural networks (CNN) is known to be efficient in image classification but non-interpretable. To overcome the black box nature of CNN a derivative of the Tsetlin automata, the convolutional Tsetlin machine (CTM) which is transparent and interpretable, was developed. As CTM handles binary inputs, it is important to transform the input images into binary form with minimum information loss so that the CTM can classify them correctly and efficiently. Currently, a relatively lossy mechanism, called adaptive Gaussian thresholding, was employed for binarization. To retain as much information as possible, in th…
Incremental web crawling as a competitive game of learning automata
2005
Masteroppgave i informasjons- og kommunikasjonsteknologi 2005 - Høgskolen i Agder, Grimstad There is no doubt that the World Wide Web has lived up to it’s hype of being the world’s central information highway through the past years. An increasing amount of versatile services keeps finding their way onto the Web as information providers continue to embrace the possibilities that the Web can offer. Especially the possibility of producing dynamic content has been an accelerant factor and is the reason why we now conveniently can participate in online auctions or see the latest development of our favorite stocks in near real-time from our own living rooms. However, for automated data mining app…
Camera functionality in modern mobile terminals : software FIR filter for demosaicing with RISC
2001
Masteroppgave i informasjons- og kommunikasjonsteknologi 2001 - Høgskolen i Agder, Grimstad This thesis discusses implementation and optimizing of the image pre-processing operation demosaicing on a typical hardware architecture for mobile terminals. Work has shown that the demosaicing operation is equivalent to the mathematical operation of interpolation, and that optimizing potential lies within the implementation of the anti-imaging filter for the interpolator. This filter can be realized as an FIR filter with the filter coefficients obtained from a suitable interpolation function (kernel). Through literature review, nearest neighbor replication, bilinear and cubic convolution kernels we…
Studie av ulike Mother Wavelets til bruk innen kantdeteksjon av blodårer i ultralydbilder
2003
Masteroppgave i informasjons- og kommunikasjonsteknologi 2003 - Høgskolen i Agder, Grimstad Kantdeteksjon er en viktig forutsetning for at operasjoner skal kunne gjennomføres på en tryggest mulig måte. Kirurgene må vite hvor blodårene er for å unngå og gjøre skade på pasienten. Metodene som blir brukt til kantdeteksjon i dag er i mange tilfeller ikke gode nok. Arbeidet med å forbedre og automatisere metodene for kantdeteksjon i medisinske bilder er en kontinuerlig prosess. Vi har bygget en java-applikasjon som bruker wavelets for å prøve og finne kanter i ultralydbilder og syntetiske bilder. Applikasjonen har vi brukt til å teste ulike Mother Wavelets. Testingen ble gjort for å finne ut hvi…