Search results for "Software"

A new algorithm for bit rate allocation in JPEG2000 tile encoding

2004

A new algorithm for allocating a given bit rate to different image tiles in the JPEG2000 encoding system is proposed. The algorithm outperforms other approaches commonly used in implementations. The new algorithm is suitable when information content is not equally distributed across the image. It is based on the computation of an index of the information content of each tile. To implement the proposed approach, we modified JasPer, a free software-based JPEG2000 coder implementation (Adams, M.D. and Kossentini, F., Proc. IEEE Int. Conf. on Image Process., vol.2, p.53-6, 2000). The experimentation was carried out on a subset of the JPEG2000 test images. Experimental results are reported, show…

The Sound Design Toolkit

2017

The Sound Design Toolkit is a collection of physically informed sound synthesis models, specifically designed for practice and research in Sonic Interaction Design. The collection is based on a hierarchical, perceptually founded taxonomy of everyday sound events, and implemented by procedural audio algorithms which emphasize the role of sound as a process rather than a product. The models are intuitive to control – and the resulting sounds easy to predict – as they rely on basic everyday listening experience. Physical descriptions of sound events are intentionally simplified to emphasize the most perceptually relevant timbral features, and to reduce computational requirements as well. Keywo…

Automatic Volumetric Liver Segmentation Using Texture Based Region Growing

2010

In this paper an automatic texture based volumetric region growing method for liver segmentation is proposed. 3D seeded region growing is based on texture features with the automatic selection of the seed voxel inside the liver organ and the automatic threshold value computation for the region growing stop condition. Co-occurrence 3D texture features are extracted from CT abdominal volumes and the seeded region growing algorithm is based on statistics in the features space. Each CT volume is composed by 230 slices, having 512 x 512 pixels as spatial resolution, and 12-bit gray level resolution. In this initial feasible study, 5 healthy volunteer acquisitions has been used. Tests have been p…

The four types of self-adaptive systems: A metamodel

2017

The basic ideas of self-adaptive systems are not a novelty in computer science. There are plenty of systems that are able of monitoring their operative context to take run-time decisions. However, more recently a new research discipline is trying to provide a common framework for collecting theory, methods, middlewares, algorithms and tools for engineering such software systems. The aim is to collect and classify existing approaches, coming from many different research areas. The objective of this work is providing a unified metamodel for describing the various categories of adaptation.

A Norm-Governed Holonic Multi-agent System Metamodel

2013

Modeling and designing systems that require a high level of coordination, control and automation is a very difficult task. The problem is the lack of design processes able to cover all the features these systems present. This paper presents an extension of the ASPECS metamodel for supporting organizational and normative principles and it allows to define models not only from an holonic agent viewpoint but also from a normative organization perspective. Moreover, our work emphasizes and makes it explicit the norms that regulate the structural, behavioral and finally adaptive aspect of an organizational system. The extended metamodel was experimented creating a Virtual Enterprise model for th…

Pattern Reuse in the PASSI Methodology

2004

Evaluation of a nonlinear prediction algorithm quantifying regularity, synchronization and directionality in short cardiovascular variability series

2006

An unifying approach evaluating complex dynamics and dynamical interactions in short bivariate time series is presented. The method performs nearest neighbor local linear prediction to estimate regularity, synchronization and directionality of two interacting time series. It was implemented through a specific cross-validation procedure which allowed an unconstrained embedding of the series and a full exploitation of the available data to maximize the accuracy of prediction. The approach was evaluated by simulations of stochastic (autoregressive processes) and deterministic (Henon maps) models in which uncoupled, unidirectionally coupled and bidirectionally coupled dynamics were generated. T…

Le idee e il muro del suono. I programmi per elaboratore nella più recente giurisprudenza europea

2013

Computer programs in the most recent european case law

Grammatizzazioni dello spazio-corpo: tra algoritmizzazione ed eccedenze

2015

Lo spazio definito dalle nuove tecnologie digitali viene sempre più frequentemente descritto attorno ai concetti problematici di condivisione, cooperazione, moltiplicazione dei punti di enunciazione, facilitazione e accesso (più) democratico ai beni e ai servizi. Più realisticamente può essere raccontato come uno spazio fondato sulla chimera della neutralità e della calcolabilità dell'esistente. A partire dal tentativo continuo (e mai compiuto) di gestione delle pluri-potenzialità dello spazio-corpo attraverso la grammatizzazione algoritmica, ci interessa indagare la cartografia degli anfratti, delle zone di accumulo dell'ingestibile, coestensivi o conflittuali alla spazialità definita dal …

Soft Cinema: creatività, software e automazione

2015

Soft Cinema: Navigating the Database is the result of a theoretical and artistic research conducted by Lev Manovich and Andreas Kratky with the aim of investigating the possibilities of cinema in the era of new digital technologies. The semi-automatic process of film-making that drives Soft Cinema depicts important aspects regarding the functioning of the software, algorithms and electro-computational automation. The essay, by extending the theoretical reflection of the authors, shows how these aspects play a crucial role in the development of new digital technologies and their relationship with contemporary capitalism.