Lossless reshaping of structured light

The Refractor Problem in Reshaping Light Beams

Localization of light in lossless inhomogeneous dielectrics

The localization of electromagnetic waves in lossless inhomogeneous dielectric media is studied. We consider a three-dimensional lossless periodic medium (photonic crystal) having a gap in the frequency spectrum (photonic bandgap). If such a medium is perturbed by either a single defect or a random array of defects, exponentially localized electromagnetic waves arise with frequencies in the gap...

Concealing with Structured Light

While making objects less visible (or invisible) to a human eye or a radar has captured people's imagination for centuries, current attempts towards realization of this long-awaited functionality range from various stealth technologies to recently proposed cloaking devices. A majority of proposed approaches share a number of common deficiencies such as design complexity, polarization effects, b...

Calibrating a Structured Light

Calibration of a structured light system is considered in this paper. The system consists of a projector whose output is controlled by a liquid crystal shutter, and a camera to capture the images. A sequence of patterns is projected to temporally encode 256 stripes on the visible surfaces. The transformation from 3D world coordinates to camera image plane coordinates and projector stripe ids ar...

Reconstruction Using Structured Light

Extracting range data through active optical triangulation requires robust stripe edge detection w. r. t. the emitted pattern. On the other hand, due to ambiguous subpattern in the projection caused by the limitations of the windowed uniqueness property, corresponding a pattern consisting of multiple stripes, in attempts to reduce the number of input images, often leads to mislabeling. Moreover...