1,919 research outputs found
Transformation Strokes
No full textIn this paper, we present a sketch-based technique for specifying transformations for general models by means of a single stroke, offering a more streamlined form of user interaction. The shape of the stroke is interpreted to allow composition of translation, rotation and scaling. We extract two main directions from the input stroke using Principle Component Analysis and use them to obtain an appropriate transformation for the model. Our method helps to have a more natural and faster way of assembling 3D structures. It is general and does not depend on specific knowledge about the type of models. As such, it can fit in the majority of graphics systems or modelling techniques.Eurographics Workshop on Sketch-Based Interfaces and Modelin
FIGURE 14 in A sketch-based system for modeling 3D objects: Applications to taxonomy
No full textFIGURE 14. Male terminalia of Chrysopilus (Diptera, Rhagionidae): (a) Epandrium, dorsal view, of C. phaeopterus (from Santos & Amorim 2007); (b) our sketch traced over the original illustration; and (c) The 3D resulting model.Published as part of Ramos, Saulo, Santos, Charles Morphy D., Sousa, Mario Costa & Gois, João Paulo, 2021, A sketch-based system for modeling 3D objects: Applications to taxonomy, pp. 537-550 in Zootaxa 5039 (4) on page 546, DOI: 10.11646/zootaxa.5039.4.5, http://zenodo.org/record/551599
FIGURE 16 in A sketch-based system for modeling 3D objects: Applications to taxonomy
No full textFIGURE 16. Head of Austroleptis papaveroi (Diptera, Austroleptidae): (a) photograph using a microscope (from Fachin et al. 2018); (b) our closed contour selection based on the photograph; (c) colored layers; and (d)–(f) resulting 3D model.Published as part of Ramos, Saulo, Santos, Charles Morphy D., Sousa, Mario Costa & Gois, João Paulo, 2021, A sketch-based system for modeling 3D objects: Applications to taxonomy, pp. 537-550 in Zootaxa 5039 (4) on page 547, DOI: 10.11646/zootaxa.5039.4.5, http://zenodo.org/record/551599
Modeling Plant Variations through 3D Interactive Sketches
No full textModeling realistic looking plants is still a complex problem requiring specification of plant structure, geometry and surface characteristics. Modeling a collection of plants is more problematic especially since each plant is slightly different. Altering the shape of branches and stems is one of the most dramatic and natural methods of creating differing instances of the same plant type. We present a sketch-based interface for modeling plant variations through specification of branch and stem shape. Our system is based on interaction with the 3D Tractus: a new physical interface we developed to support direct 3D sketching. The 3D strokes from the 3D Tractus are used as input to a biologically-based modeling method that mimics natural growth variation factors of real plants.Eurographics Workshop on Sketch-Based Interfaces and Modelin
Educação Religiosa em Costa Rica: confessionalidade, neutralidade, interculturalidade
No full textEl autor propone aquí un modelo
de educación religiosa que recoge
el pronunciamiento de la Sala de lo
Constitucional, así como los desafíos
del contexto cada vez más mutirreligioso
de Costa Rica. Se trata de una
propuesta que va más allá de lo ecuménico
y de lo interrreligioso y, que
tiene como finalidad, generar procesos
educativos inclusivos, orientados
a educar desde la convivencia en la
diversidad y capaces de hacer de la
diversidad de creencias, espiritualidades
y convicciones, una ocasión
para aprender.The author proposes here a model of
religious education that includes the
pronouncement of the Constitutional
Chamber and the challenges of
increasingly mutireligious context
of Costa Rica. It is a proposal that
goes beyond the ecumenical and the
inter-religious issue and that aims
to generate inclusive educational
processes oriented toward educating from coexistence in diversity and
capable of making the diversity of
beliefs, spirituality and convictions a
chance to learn.Escuela de Ecuménica y Ciencias de la Religió
Computer graphics : theory and practice / Jonas Gomes, Luis Velho, Mario Costa Sousa.
No full textIncludes bibliographical references (p. 507-515) and index.Book fair 2013.xx, 524 p., [16] p. of plates
EUROGRAPHICS Workshop on Sketch-Based Interfaces and Modeling (2006) Thomas Stahovich and Mario Costa Sousa (Editors) Abstract Transformation Strokes
No full textIn this paper, we present a sketch-based technique for specifying transformations for general models by means of a single stroke, offering a more streamlined form of user interaction. The shape of the stroke is interpreted to allow composition of translation, rotation and scaling. We extract two main directions from the input stroke using Principle Component Analysis and use them to obtain an appropriate transformation for the model. Our method helps to have a more natural and faster way of assembling 3D structures. It is general and does not depend on specific knowledge about the type of models. As such, it can fit in the majority of graphics systems or modelling techniques
FIGURE 1 in A sketch-based system for modeling 3D objects: Applications to taxonomy
No full textFIGURE 1. Categories supported as inputs for the reconstruction of a chromosome. Input strokes belong to three categories: (a) open contours and their respective 3D reconstruction; (b) closed contours and 3D surface reconstruction; (c) stripes sketched using our system and interactions and their 3D reconstruction; and (d) final 3D model combining the three categories.Published as part of Ramos, Saulo, Santos, Charles Morphy D., Sousa, Mario Costa & Gois, João Paulo, 2021, A sketch-based system for modeling 3D objects: Applications to taxonomy, pp. 537-550 in Zootaxa 5039 (4) on page 538, DOI: 10.11646/zootaxa.5039.4.5, http://zenodo.org/record/551599
Sketch-based Volumetric Seeded Region Growing
No full textInteractive volume segmentation is an essential and important step in medical image processing. Conventional interactive methods typically demand significant amounts of time and do not lend to a natural interaction scheme with the 3D volume. In this paper we present a sketch-based interface for seeded region growing volume segmentation. In our approach, the user freely sketches regions of interest (ROI) directly over the 3D volume. Parts of the volume outside the ROIs are then automatically cut out in real-time. The user repeats this process as many times as necessary until he/she decides to specify the seed point 3D location directly at the ROI. To prevent unexpected segmentations, the region growing is restricted to the specified ROI. Our sketch-based system utilizes GPU programming to achieve real-time processing for both rendering and volumetric cutting independent from the size and shape of the sketched strokes.Eurographics Workshop on Sketch-Based Interfaces and Modelin
La musa proletaria en Costa Rica 1900-1948
No full textEn este artículo el autor estudia un género particular de poesía popular y marginal escrita en Costa Rica a inicios del siglo XX. Esta literatura proletaria fue producida principalmente por obreros y artesanos de la ciudad.In this article the author analyzes a particular gender of popular and marginal poetry written in Costa Rica at the beginning of the 20th century. This proletarian literature was produced mainly by workers and craftsmen from the city.
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