Abstract
We report a new scheme of ghost imaging by using a spatially structured pump in the Fourier domain of spontaneous parametric down-conversion for quantum-correlation-based pattern recognition. We exploit the mathematical feature of Laguerre-Gaussian mode’s Fourier transform to describe the pump-modulated formation of a ghost image. Of particular interest is the experimental demonstration of a quantum equivalence of a Vander Lugt filter, based on which the nonlocal spiral phase contrast for vortex mapping and quantum-correlation-based human face recognition are implemented successfully. The photons used for probing a test object, scanning the database, and producing a correlation signal can belong to three different light beams, which suggests some security applications where low-light-level illumination and covert operation are desired.
- Received 7 October 2018
DOI:https://doi.org/10.1103/PhysRevLett.122.123901
© 2019 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
Face Recognition with Ghost Imaging
Published 26 March 2019
Using a variation of a technique known as ghost imaging, researchers demonstrate a face recognition protocol that works without complex image analysis algorithms.
See more in Physics