Phase mask selection in wavefront coding systems: an adaptive approach

A method for optimizing the strength of a parametric phase mask for a wavefront coding imaging system is presented. The method is based on an optimization process that minimizes a proposed merit function. The goal is to achieve modulation transfer function invariance while quantitatively maintaining nal image delity. A parametric lter that copes with the noise present in the captured images is used to obtain the nal images, and this lter is optimized. The whole process results in optimum phase mask strength and optimal parameters for the restoration lter. The results for a particular optical system are presented and tested experimentally in the labo- ratory. The experimental results show good agreement with the simulations, indicating that the procedure is useful.

Creative Commons lizentziak Estatu espainiarrean

Duela pare bat urte gutxi batzuk ezagutzen zituzten Creative Commons lizentziak, baina gaur egun termino hori sarean libre dauden obra digitaletarako lizentzien estandarrari lotzen ari zaio, GNU (GPL, LGPL) proiektuko lizentziak software librerako estandar bati lotzen zaizkion bezala

A feed-forward spiking model of shape-coding by IT cells

The ability to recognize a shape is linked to figure-ground (FG) organization. Cell preferences appear to be correlated across contrast-polarity reversals and mirror reversals of polygon displays, but not so much across FG reversals. Here we present a network structure which explains both shape-coding by simulated IT cells and suppression of responses to FG reversed stimuli. In our model FG segregation is achieved before shape discrimination, which is itself evidenced by the difference in spiking onsets of a pair of output cells. The studied example also includes feature extraction and illustrates a classification of binary images depending on the dominance of vertical or horizontal borders.

Creative thinking

Portal web d'intercanvi d'idees creatives, confeccionat en tecnología JEE i Liferay com a gestor de continguts i gestor de portlets.

Creative Industries: a Preliminary Insight to their Location Determinants

This paper is about location decisions of Creative Industries and the role played by existent spatial distribution and agglomeration economies of these kinds of activities in order to analyse their location determinants. Our main statistical source is the REIC (Catalan Manufacturing Establishments Register), which has plant-level microdata on location of new plants. Using Count Data Models, our main results show that location determinants are quite similar between both industries and also both non-creative and creative firms are positively influenced by the specialisation level in Creative Industries of municipalities. Moreover, our results provide evidence that the unobserved ‘creative milieu’ has a limited impact on attracting firms. Keywords: creative industries, creative milieu, count data models, industrial location, agglomeration economies

Competencias creativas en el aula de música = Creative competences in music classes

En el marco de las competencias profesionales del educador musical, la creatividad ocupa una posición que a menudo ha sido definida como sistémica. La labor del educador y/o formador en el aula de música requiere, de forma genérica, el despliegue de competencias que incorporen la creatividad. En este artículo se presentan los resultados de un trabajo realizado con dos muestras de alumnos, de tercer curso de magisterio y de un curso postgrado. Se ofrecen y se analizan los datos recogidos con la finalidad de desplegar un mapa que integre competencias creativas genéricas, específicas y disciplinares