4 papers
Reading hidden writing and drawings on papyrus using speckle optical technique and multispectral images
L. Buffarini, H. J. Rabal, N. L. Cap +3
We carried out an experimental set-up for reading a hidden drawing under papyrus using an optical technique based on the speckle phenomenon that is observed when a rough surface is…
Vortex metrology using circular and elliptical Laguerre Gauss kernels
Hector Rabal, Myrian Tebaldi, Astrid Villamizar Amado +2
We propose a generalization of the Laguerre Gauss Transform to include elliptical kernels in vortices metrology. To that end, we broaden the original pseudo field obtained using La…
The Degrees of Symmetry functions
Hector Rabal, Nelly Cap
We propose a generalization of the concept of symmetry as a continuous function of the reference center or line location. We suggest that this concept can be applied to many closed…
An intuitive introduction to the concept of spatial coherence
Héctor Rabal, Nelly L. Cap, Eduardo Grumel +1
The concept of spatial coherence is usually hard to be understood the first time that it is studied. We propose here a fully intuitive geometric description that does not contain m…