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3D reconstruction system on smartphone
3D reconstruction system on smartphone
Marko Lelas
In order to develop a novel 3D reconstruction system on smartphone, this work first gives an analysis of the state of the art active and passive stereo 3D approaches. Drawbacks as well as the advantages of the mentioned approaches are identified and a novel approach to stereo correspondence estimation is presented as a combination of the main ideas of the approaches. In brief, the proposed approach considers image pixel values both in spatial and time domain. That way inherent downsides,...
4D medical data compression architecture
4D medical data compression architecture
Martin Žagar
This thesis presents a novel framework for four-dimensional medical data compression architecture. This framework is based on different procedures and algorithms that detect time and spatial redundancy in recorded MRI volumes. Motion in time is analyzed through motion estimation based on neural networks. Motion estimation is used to eliminate a large amount of temporal and frequency redundancies that exists in sequences of 3D data. Combination of segmentation, block matching and motion field...
A Framework for Service-level End-to-end Quality of Service Negotiation and Adaptation
A Framework for Service-level End-to-end Quality of Service Negotiation and Adaptation
Lea Skorin-Kapov
With the move towards a converged, all-IP next generation network (NGN) offering end users personalized, advanced multimedia services anywhere and anytime, a key challenge to be addressed is support for the service-level negotiation and dynamic adaptation of Quality of Service (QoS) parameters. Considering that the majority of existing approaches presented in literature and standards focus on solving particular aspects of this problem, it may be concluded that there is a need for a...
A framework for end-to-end qualiti of service analysis in a multi-provider environment
A framework for end-to-end qualiti of service analysis in a multi-provider environment
Irena Grgić Gjerde
The structure of today’s telecommunications market is getting more complex than ever due to multiple reasons. First of all, the traditional monopolistic Public Network Operators’ (PNOs) market is moving towards an open market with many various players. Such liberalisation is followed by a strengthening of regulatory directives that support and favour the open market, e.g. Open Network Provision (ONP) directives from the European Commission (EC). Other characteristics of such market...
A probabilistic quality of service model for nondeterministic service compositions.
A probabilistic quality of service model for nondeterministic service compositions.
Adrian Satja Kurdija
Cloud computing becomes the prevailing aspect of software engineering. In Service-Oriented Architecture (SOA), various atomic services respond to various client requests in a cloud. Selecting the actual service instance to process a particular request can be an issue when requirements for multiple Quality of Service (QoS) properties need to be satisfied for many users simultaneously. The problem becomes more complex if we take into account the compositeness of users’ applications, which...
Active RC Filter Design Using Impedance Tapering
Active RC Filter Design Using Impedance Tapering
Dražen Jurišić
The design procedure of low-sensitivity, low-pass (LP) 2nd- and 3rd-order class-4 Sallen and Key active resistance-capacitance (RC) allpole filters, using impedance tapering, has already been published [1]. There a ladder structure in the positive feedback loop of an operational amplifier was used. In this work, desensitisation using impedance tapering is applied to LP, HP and BP filters up to 6th-order, with single operational amplifier. Realizability constraints are also given. It was...
Adaptive Instantaneous Frequency Estimation of Noisy Nonstationary Signals
Adaptive Instantaneous Frequency Estimation of Noisy Nonstationary Signals
Jonatan Lerga
Methods for a noisy nonstationary signal instantaneous frequency (IF) estimation from its time-frequency representation (TFR) have been proposed. The IF estimation error exhibits bias and variance dependant on the TFR analysis window width. Due to the opposite tendency of bias and variance with respect to the lag window width, a proper width has been found as the one providing the bias-to-variance tradeoff that reduces the estimation error. The adaptive window widths have been obtained by...
Adaptive lifting scheme for nonseparable two-dimensional wavelet transforms
Adaptive lifting scheme for nonseparable two-dimensional wavelet transforms
Miroslav Vrankić
In this thesis, we propose the novel adaptive wavelet filter bank structures that are used to obtain efficient representations of the analyzed images. We present the lifting scheme structures for building adaptive wavelet decompositions based on the nonseparable quincunx sampling scheme. The resulting wavelet decompositions are adaptive to the local properties of the analyzed image. Despite the introduced adaptation, a desired number of vanishing moments is still retained. The proposed...
Adaptive stimulation of emotional system based on virtual reality
Adaptive stimulation of emotional system based on virtual reality
Siniša Popović
Certain areas of human activity, like training for stressful tasks, the psychotherapy of stress-related disorders, or entertainment, seem to endorse targeted modulation of human emotional states. Modulation may be implicit (e.g. contained in the plot of a movie or a computer game), or actively conducted by the qualified domain experts (e.g. therapists in psychotherapy). Affective computing paradigm, in which the computers attempt to recognize and appropriately respond to the user’s...
Adaptivna valićna transformacija temeljena na kriteriju najmanje apsolutne pogreške
Adaptivna valićna transformacija temeljena na kriteriju najmanje apsolutne pogreške
Ana Sović Kržić
Rijedak zapis signala je važan za čitav niz primjena: kompresiju, potiskivanje šuma, rekonstrukciju signala, sažimajuće očitavanje, estimaciju, slijepu separaciju statistički zavisnih signala, izdvajanje značajki i mnoge druge. Kako bi se postigao rijedak zapis, u ovoj disertaciji je korišten kriterij najmanje apsolutne pogreške (NAP). Nova NAP metoda kretanja po bridovima u prostoru funkcije cilja rekurzivnom redukcijom dimenzionalnosti pokazuje prednosti za sustave s velikim...
Adaptivni antenski sustavi u pokretnim komunikacijama
Adaptivni antenski sustavi u pokretnim komunikacijama
Nikica Belančić
Konfiguracija antenskog sustava ima veliki utjecaj na kvalitetu i parametre pokretnog komunikacijskog sustava. Kako se adaptivni antenski sustavi sve više promatraju u svjetlu njihovog uvođenja u komercijalne komunikacije, svrha ovog rada je analiza opravdanosti takvih razmatranja obzirom na više aspekata. Stoga je u ovom radu ukratko predstavljen utjecaj antenskih sustava na kvalitetu pokretnog komunikacijskog sustava, te je predstavljeno nekoliko osnovnih konfiguracija antenskih sustava...
Adaptivno podučavanje zasnovano na teoriji prostora znanja
Adaptivno podučavanje zasnovano na teoriji prostora znanja
Sonja Prišćan
Udaljeno učenje putem Interneta danas više nije novost ni u svijetu, niti u Hrvatskoj. Postojeći obrazovni programi su interaktivni, multimedijalni, omogućuju samoučenje, samotestiranje i interakciju s mentorom. Međutim, vrlo je malo sustava koji se prilagođuju studentu prateći njegov napredak i njegove odgovore na pitanja. Takvo prilagođivanje studentu naziva se adaptivno testiranje i adaptivno podučavanje. U ovom radu dan je pregled postojećih slobodno dostupnih i komercijalnih...

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