Weightless Neural Networks (WNN) are good candidates for Federated Learning scenarios due to their robustness and computational lightness. In this work, we show that it is possible to aggregate the knowledge of multiple WNNs using more compact data structures, such as Bloom Filters, to reduce the amount of data transferred between devices. Finally, we explore variations of Bloom Filters and found that a particu...
Descreve-se a arquitectura do Sistema de Animação 3D (SA3D), um Sistema de Animação Modelada por Computador desenvolvido no projecto CAD/CAM no INESC, sob o ponto de vista da funcionalidade dos diferentes módulos constituintes : Modelação Geométrica 3D, Síntese de Movimento (Animação), Síntese de Imagem Realista e Edição e Digitalização 2D. Referem-se ainda alguns resultados obtidos com o Sistema, bem como a ut...
MIXDesign, provides a tangible Mixed-Reality system oriented towards tasks in Architectural Design, in several! usage scenarios, such as Conceptual Design, Client Brief, or even Architectural Design education. With MIXDesign, an architect can intuitively interact with a real scale model of the design, in normal working settings, where he can observe an enhanced version of the scale model, with JD virtual object...
We present a general computational architecture that solves the problem of the production of physical-based virtual textiles and garments (so-called electronic garments or e-garments), applicable in internet-based electronic-commerce scenarios. We focus on the evaluation of their visual and mechanical precision, relative to the textile quality control procedures adopted by the industry. Our proposed architectur...
An animation of a deformable surface with fixed topology is formed by a set of connected points (particles), which follow a trajectory over time. The transmission of such an animation is a task that consumes large amounts of bandwidth, as the position of each particle, in each time instant, needs to be transmitted. We propose a wavelet-based compression and streaming mechanism that allows the minimization of th...
ln this work, we report a Tangible Augmented Reality system that can be applied to interactive visualization scenarios in the cardiology medical field, such as in the teaching of medical techniques or the recognition of organs. Moreover, it can be used for more detailed and natural interaction with virtual models of organs or other physiological structures of the human body. The system allows users to naturally...
In this work, we present a novel free-hand gesture user interface based on detecting the trajectory of fiducial markers attached to the user's fingers and pulse, able to interact with a sequence of images of a digital video piece. The model adopted for the video representation is based on its decomposition in a sequence of frames or filmstrip. Sensor-less and cable-less interfaces provide the means for a user t...
Neste artigo apresentamos um sistema para computação móvel em cenários interiores, baseado em PDA, que consegue resolver com técnicas de visão por computador, a localização do utilizador e possibilita a sua orientação dentro de um edifício através de marcas dispostas em locais estratégicos, previamente identificados. As marcas, capturadas com a câmara de vídeo integrada no PDA, são conhecidas pelo sistema, que ...
ln the context of project Ciência Viva da Mina do Lousal, we developed an immersive virtual reality environment in which a group of people, for example, students, can visit a mine. This article discusses and rationalizes the diverse technological choices to achieve this task.
Este artigo descreve a construção de uma interface tangível para ambientes de entretenimento em realidade aumentada e mista, bem como de um jogo demonstrador da nova interface, designado por BlowPipe. O ambiente demonstrado disponibiliza ao utilizador um jogo imersivo, que tem lugar dentro de uma arena, um espaço de interacção em realidade aumentada e mista. Utilizando uma zarabatana física e dardos virtuais, p...