Implementation of a robust coded structured light technique for dynamic 3D measurements

This paper presents the implementation details of a coded structured light system for rapid shape acquisition of unknown surfaces. Such techniques are based on the projection of patterns onto a measuring surface and grabbing images of every projection with a camera. Analyzing the pattern deformations that appear in the images, 3D information of the surface can be calculated. The implemented technique projects a unique pattern so that it can be used to measure moving surfaces. The structure of the pattern is a grid where the color of the slits are selected using a De Bruijn sequence. Moreover, since both axis of the pattern are coded, the cross points of the grid have two codewords (which permits to reconstruct them very precisely), while pixels belonging to horizontal and vertical slits have also a codeword. Different sets of colors are used for horizontal and vertical slits, so the resulting pattern is invariant to rotation. Therefore, the alignment constraint between camera and projector considered by a lot of authors is not necessary

Les Glosses romàniques del manuscrit de la Biblioteca Vaticana Ebr. 413

Estudi del manuscrit hebreu 413 de la Biblioteca Vaticana què conté un diccionari hebreu del segle XIII. Aquest diccionari té un gran interès per a la filologia romànica, atès que conté un conjunt de 155 glosses en una llengua romànica, que l'editor del manuscrit identifica com a provençal. L’anàlisi detallada d'aquestes glosses permet que,en bona part puguin ser llegides com a catalanes i, alhora, convida a pensar en les profundes concomitàncies existents entre les dues llengües en aquest moment de la historia dels orígens romànics