PERISCOPIC LENSES

Periscopic stereo and large-scale scene reconstruction

The capture of three dimensional structure from two dimensional images has received considerable attention in computer vision. Existing work has concentrated on use of stereo camera systems and the reconstruction of small objects. Recently, single cameras in motion have been used to capture sections of scenery which are subsequently reconstructed by skilled technicians with a selection of compu...

Smart Lenses

Focus + context techniques are widely used for the efficient visualization of large data sets. However, the corresponding adaptation of the representation to the task at hand is not trivial, requiring a suitable model of the visualization goal. One type of focus + context technique is the use of lenses, interactive tools that modify the visualization in a locally confined region and can be ’sta...

Devil's lenses.

In this paper we present a new kind of kinoform lenses in which the phase distribution is characterized by the "devil's staircase" function. The focusing properties of these fractal DOEs coined devil's lenses (DLs) are analytically studied and compared with conventional Fresnel kinoform lenses. It is shown that under monochromatic illumination a DL give rise a single fractal focus that axially ...

Double lenses

The analysis of the shear induced by a single cluster, acting as a gravitational lens, on the images of a large number of background galaxies is all centered around the curl-free character of a well-known vector field that can be derived from the data; in particular, the mass reconstruction methods, currently producing many interesting astrophysical applications, are all based on this tensorial...

[contact Lenses].