18 research outputs found
Autotagging to Improve Text Search for 3D Models
No full textText search on 3D models has traditionally worked poorly, as text annotations on 3D models are often unreliable or incomplete. In this paper we attempt to improve the recall of text search by automatically assigning appropriate tags to models. Our algorithm finds relevant tags by appealing to a large corpus of partially labeled example models, which does not have to be preclassified or otherwise prepared. For this purpose we use a copy of Google 3DWarehouse, a database of user contributed models which is publicly available on the Internet. Given a model to tag, we find geometrically similar models in the corpus, based on distances in a reduced dimensional space derived from Zernike descriptors. The labels of these neighbors are used as tag candidates for the model with probabilities proportional to the degree of geometric similarity. We show experimentally that text based search for 3D models using our computed tags can work as well as geometry based search. Finally, we demonstrate our 3D model search engine that uses this algorithm and discuss some implementation issues
At the bottom of writing: tensions in the poetry of Armando Freitas Filho
No full textO trabalho realiza um percurso interpretativo de parte da obra do poeta Armando Freitas Filho (1940) ancorado no acompanhamento da questão apresentada como a da \"dificuldade da escrita\". Seu principal objetivo é caracterizar o modo como o autor articula discurso metapoético e discurso de abertura à experiência, por meio da análise de diferentes momentos de figuração da escrita. Para tanto, seu primeiro capítulo é dedicado à investigação da fase de formação do poeta, enquanto um segundo capítulo é consagrado à análise detida do livro que publicou em 1982, longa vida.The study proposes an interpretative itinerary through part of the poet Armando Freitas Filho\'s work, grounded on the observation of a question presented here as: the \"difficulty of writing\". Its principal aim is to characterize the way by which the author articulates metapoetic speech and experience-oriented speech, through the analysis of different moments in which figurations of writing are carried out. Its first chapter is dedicated to the investigation of Freitas Filho\'s formative period, whilst a second chapter is consecrated to a close reading of longa vida, published by the author in 1982
Dimensionality reduction for hand-independent dexterous robotic grasping
No full textIn this paper, we build upon recent advances in neuroscience research which have shown that control of the human hand during grasping is dominated by movement in a configuration space of highly reduced dimensionality. We extend this concept to robotic hands and show how a similar dimensionality reduction can be defined for a number of different hand models. This framework can be used to derive planning algorithms that produce stable grasps even for highly complex hand designs. Furthermore, it offers a unified approach for controlling different hands, even if the kinematic structures of the models are significantly different. We illustrate these concepts by building a comprehensive grasp planner that can be used on a large variety of robotic hands under various constraints
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SHREC'08 entry: Training set expansion via autotags
No full textTraining a 3D model classifier on a small dataset is very challenging. However, large datasets of partially classified models are now commonly available online. We use an external training set of models with associated text tags to automatically assign tags to both training and query models. The similarity between these tags, used in conjunction with a standard shape descriptor, yields a multiclassifier that outperforms the standalone shape descriptor
A deusa, o cavalo. Duas figuras de Nuno Ramos
No full textThe paper presents an interpretative reading of a few literary works by Brazilian writer and visual artist Nuno Ramos (1960), also exploring connections between these texts and plastic works, essays and songs produced by the same author. Two fictional-poetic figures from the books Sermões (2015) and Adeus, cavalo (2017) set forth our reading – the goddess and the horse –, in dialogue with two conceptual figures, the voice and the sign.O artigo propõe um percurso interpretativo por alguns trabalhos literários do escritor e artista visual Nuno Ramos (1960), recorrendo pontualmente a comentários acerca de trabalhos plásticos, canções e ensaios realizados pelo artista. Como mote à interpretação, discute-se duas figuras ficcionais-poéticas extraídas dos livros Sermões (2015) e Adeus, cavalo (2017), a deusa e o cavalo, postas em diálogo com duas outras figuras conceituais, a voz e o signo
