Adaptive image vectorisation and brushing using mesh colours

We propose the use of curved triangles and mesh colours as a vector primitive for image vectorisation. We show that our representation has clear benefits for rendering performance, texture detail, as well as further editing of the resulting vector images. The proposed method focuses on efficiency, but it still leads to results that compare favourably with those from previous work. We show results over a variety of input images ranging from photos, drawings, paintings, all the way to designs and cartoons. We implemented several editing workflows facilitated by our representation: interactive user-guided vectorisation, and novel raster-style feature-aware brushing capabilities

StrokeStyles: Stroke-based Segmentation and Stylization of Fonts

We develop a method to automatically segment a font’s glyphs into a set of overlapping and intersecting strokes with the aim of generating artistic stylizations. The segmentation method relies on a geometric analysis of the glyph’s outline, its interior, and the surrounding areas and is grounded in perceptually informed principles and measures. Our method does not require training data or templates and applies to glyphs in a large variety of input languages, writing systems, and styles. It uses the medial axis, curvilinear shape features that specify convex and concave outline parts, links that connect concavities, and seven junction types. We show that the resulting decomposition in strokes can be used to create variations, stylizations, and animations in different artistic or design-oriented styles while remaining recognizably similar to the input font

New distribution records for the American Coot (Fulica ardesiaca), the Puna Teal (Anas puna), the Andean Ruddy Duck (Oxyura ferruginea), and the Puna Ibis (Plegadis ridgwayi), in the Angostura Dam, Tafí del Valle, Tucumán, Argentina

Distribution records for four species of birds are reported from studies carried out between 2004 and 2005 at La Angostura Dam (26º55'S, 65º41'W). The species are known to inhabit lakes, lagoons, pools, marshes and streams, generally above 3000 m. Here they are found at a lower elevation, circa 2000 m. They are Fulica ardesiaca (American Coot), present all year, with high abundance and continuous nest building records; Anas puna (Puna Teal), observed in the area during winter; Oxyura ferruginea (Andean Ruddy Duck), present throughout the year, with greater abundance in winter, and Plegadis ridgwayi (Puna Ibis), with a few individuals observed in summer, autumn and winter.Distribution records for four species of birds are reported from studies carried out between 2004 and 2005 at La Angostura Dam (26o55'S, 65o41'W). The species are known to inhabit lakes, lagoons, pools, marshes and streams, generally above 3000 m. Here they are found at a lower elevation, circa 2000 m. They are Fulica ardesiaca (American Coot), present all year, with high abundance and continuous nest building records; Anas puna (Puna Teal), observed in the area during winter; Oxyura ferruginea (Andean Ruddy Duck), present throughout the year, with greater abundance in winter, and Plegadis ridgwayi (Puna Ibis), with a few individuals obser ved in summer, autumn and winter.Fil: Echevarria, Ada Lilian. Fundación Miguel Lillo; ArgentinaFil: Chani, Jose Maria. Universidad Nacional de Chilecito; ArgentinaFil: Marano, Claudia Fabiana. Fundación Miguel Lillo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; ArgentinaFil: Cocimano, Maria Constanza. Fundación Miguel Lillo. Dirección de Zoología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentin

Composition of a bird community at La Angostura Reser voir, Tafí del Valle, Tucumán, Argentina

Los estudios de las comunidades de aves contribuyen al conocimiento del rol que los humedales pueden cumplir en la conservación de la biodiversidad dentro de los biomas en los que están ubicados. Se realizaron censos de transecta de faja y se calcularon abundancia relativa, frecuencia e índice de importancia relativa. En los 121 censos realizados, se registraron 43.243 individuos, pertenecientes a 68 especies, más 10 especies observadas fuera de censo, distribuidas en 27 familias y 12 ordenes. Las especies con mayores valores en los índices calculados fueron Anas georgica, Fulica ardesiaca, Fulica armillata, Anas flavirostris, Phalacrocorax brasilianus y Vanellus chilensis. Se registraron cuatro nuevas especies de distribución altoandinas (Fulica ardesiaca, Oxyura ferruginea, Anas puna y Plegadis ridgwayi) y la nidificación de cuatro Fulica spp. en forma simultánea. Además se señala por primera vez la nidificación de Coscoroba coscoroba para esta altitud.Studies on bird communities help understand the role wetlands may play in the conservation of biodiversity of the biomes they’re located in. One-hundred-and-twenty-one transect census were performed. Relative abundance, frequency and index of relative impor tance were calculated. We recorded 43,243 specimens, belonging to 68 species, from 27 families and 12 orders. The species with the greatest index values were Anas georgica, Fulica ardesiaca, Fulica armillata, Anas flavirostris, Phalacrocorax brasilianus y Vanellus chilensis. Four new species from the high Andes wetlands were recorded (Fulica ardesiaca, Oxyura ferruginea, Anas puna y Plegadis ridgwayi), and the simultaneous nidificación of four Fulica spp. was observed. Nidification for Coscoroba coscoroba is reported for the first time at this altitude.Fil: Echevarria, Ada Lilian. Fundación Miguel Lillo; ArgentinaFil: Marano, Claudia Fabiana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo; ArgentinaFil: Chani, Jose Maria. Universidad Nacional de Chilecito; ArgentinaFil: Cocimano, Maria Constanza. Fundación Miguel Lillo. Dirección de Zoología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentin