Multi-Resolution Texture Coding for Multi-Resolution 3D Meshes

We present an innovative system to encode and transmit textured multi-resolution 3D meshes in a progressive way, with no need to send several texture images, one for each mesh LOD (Level Of Detail). All texture LODs are created from the finest one (associated to the finest mesh), but can be re- constructed progressively from the coarsest thanks to refinement images calculated in the encoding process, and transmitted only if needed. This allows us to adjust the LOD/quality of both 3D mesh and texture according to the rendering power of the device that will display them, and to the network capacity. Additionally, we achieve big savings in data transmission by avoiding altogether texture coordinates, which are generated automatically thanks to an unwrapping system agreed upon by both encoder and decoder

ITEM: Inter-Texture Error Measurement for 3D Meshes

We introduce a simple and innovative method to compare any two texture maps, regardless of their sizes, aspect ratios, or even masks, as long as they are both meant to be mapped onto the same 3D mesh. Our system is based on a zero-distortion 3D mesh unwrapping technique which compares two new adapted texture atlases with the same mask but different texel colors, and whose every texel covers the same area in 3D. Once these adapted atlases are created, we measure their difference with ITEM-RMSE, a slightly modified version of the standard RMSE defined for images. ITEM-RMSE is more meaningful and reliable than RMSE because it only takes into account the texels inside the mask, since they are the only ones that will actually be used during rendering. Our method is not only very useful to compare the space efficiency of different texture atlas generation algorithms, but also to quantify texture loss in compression schemes for multi-resolution textured 3D meshes

Alimentación responsable en la escuela pública. Una experiencia de eco-comedor autogestionado. (CEIP "Gómez Moreno. Albayzín. Granada)

At CEIP Gomez Moreno Infant and Primary School –a recognised state school in Granada’s Albayzin neighbourhood–, a group of parents, strongly committed to a Universal and Public education system as a tool to correct social inequalities, has taken on the direct management of complementary and extracurricular school services, in order to give back to society applying the specific skills and qualifications of the school community from a democratic and civic participation perspective. Among the services comprehensively and voluntarily managed by the parents’ association (AMPA in Spanish), the most successful one having the highest impact on the educational community is the school’s dining hall service, which includes the use of local and organic produce, as opposed to a general process currently taking place in Andalusia by which catering services subsidiary to large business groups are being widely implemented, leading to the indirect privatization of this public service. The results: the forceful assertion of public education, both inside and outside the community context, by means of a daily dining service with an on site kitchen serving locally sourced and organic meals; high levels of satisfaction from its users; the achievement of parents’ empowerment, as co-responsible citizens for the proper functioning of the public education service in the path towards excellence; and the contribution to the consolidation of sustainable social models.En el Centro de Educación Infantil y Primaria (CEIP) Gómez Moreno, colegio público de referencia para el barrio del Albayzín de Granada, un grupo de madres y padres, en claro compromiso por la Escuela Pública y Universal, correctora de las desigualdades sociales, asumen la gestión directa de los servicios complementarios y extraescolares del centro, como forma de revertir a la sociedad la cualificación específica de los componentes de la comunidad educativa en su entorno vivencial desde criterios de participación ciudadana y democrática. Entre los servicios gestionados de forma integral y voluntaria desde la asociación de madres y padres del alumnado (AMPA), el de mayor éxito y repercusión ante la comunidad educativa es el del comedor escolar, en el que se incorpora el consumo de alimentos locales y de producción ecológica, eludiendo el proceso generalizado en la comunidad autónoma andaluza de implantación de servicios de restauración filiales de grandes grupos empresariales que posibilitan la privatización indirecta del servicio público. Como resultado, la contundente acreditación de la Escuela Pública, dentro y fuera de su contexto comunitario, con un servicio de comedor con cocina diaria, elaborada con productos ecológicos y de cercanía, con altos niveles de satisfacción de sus usuarios, logrando el empoderamiento de madres y padres, como ciudadanía, en la co-responsabilización del funcionamiento del servicio público educativo, hacia su excelencia, incidiendo en la consolidación de modelos sociales sostenibles

One-dimensional image reconstruction by exponential filtering in infrared stellar speckle interferometry: application to IRC +10216

Exponential filtering, together with an improved version of the iterative Fourier-transform algorithm, is applied to image reconstruction from one-dimensional infrared stellar speckle interferometry data. The performance of the method is checked first by computer simulations with both noiseless and noisy data and then with a realistic simulation of one-dimensional infrared stellar speckle interferometry. We have seen no problems with convergence. The only problem that we found was an expected noisy appearance of the results when noisy data were simulated. Finally, the method was applied to observational specklegrams of the infrared source IRC +10216, in two standard photometric bands: K and M (2.2 and 5 m, respectively). The reconstruction in K of a north-south scan clearly shows three components inside a circumstellar shell. On the other hand, in the M band only a wing on the north side of the main component is resolvable.This paper was published in Journal of the Optical Society of America A, and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [article URL]. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.Peer reviewe