bstract. We propose the use of the morphological pattern specrum, or pecstrum, as the base of a biometric shape-based hand ecognition system. The system receives an image of the right hand f a subject in an unconstrained pose, which is captured with a ommercial flatbed scanner. According to pecstrum property of inariance to translation and rotation, the system does not require the se of pegs fo...

We tested the role of interspecific competition in driving species distribution at multiple spatial scales using two sibling species of Galerida larks (G. cristata and G. theklae) in Morocco (sympatry), Balearic islands (G. theklae only) and Israel (G. cristata only). We first investigated regional-scale determinants by contrasting allopatric versus sympatric patterns in five distinct habitat t...

This paper presents a hand-shape biometric system based on a novel feature extraction methodology using the morphological pattern spectrum or pecstrum. Identification experiments were carried out using the obtained feature vectors as an input to some recognition systems using neural networks and support vector machine (SVM) techniques, obtaining in average an identification of 98.5%. The verifi...

A fundamental problem in the field of off-line signature verification is the lack of a pertinent shape representation or shape factor. The main difficulty in the definition of pertinent features lies in the local variability of the signature line which is closely related to the intrinsic characteristic of human beings. In this paper we proposed a new formalism for signature representation based...

Theoretical modeling of the magnetic properties Fe 3 O 4 -Fe 3-x Ti x composites obtained by sol-gel method with subsequent hydrothermal treatment has been carried out. The magnetization reversal fields and number particles in different states an ensemble two-phase infinitely thin boundary between phases a characteristic size varying range from 30 to 80 nm were calculated using "magnet...