Nonlocal imaging by conditional averaging of random reference measurements

Abstract

We report the nonlocal imaging of an object by conditional averaging of the random exposure frames of a reference detector, which only sees the freely propagating field from a thermal light source. A bucket detector, synchronized with the reference detector, records the intensity fluctuations of an identical beam passing through the object mask. These fluctuations are sorted according to their values relative to the mean, then the reference data in the corresponding time-bins for a given fluctuation range are averaged, to produce either positive or negative images. Since no correlation calculations are involved, this correspondence imaging technique challenges our former interpretations of "ghost" imaging. Compared with conventional correlation imaging or compressed sensing schemes, both the number of exposures and computation time are greatly reduced, while the visibility is much improved. A simple statistical model is presented to explain the phenomenon.

5 pages, 5 figures

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Cited by in corpus (15)

• Super sub-Nyquist single-pixel imaging by means of cake-cutting Hadamard basis sort
• Super-resolution far-field ghost imaging via compressive sampling
• Time-correspondence differential ghost imaging
• Single-pixel ghost microscopy based on compressed sensing and complementary modulation
• Single-pixel imaging with origami pattern construction
• A Double-Threshold Technique for Fast Time-Correspondence Imaging
• Negative exponential behavior of image mutual information for pseudo-thermal light ghost imaging: Observation, modeling, and verification
• High visibility temporal ghost imaging with classical light
• Spatial interference between pairs of disjoint optical paths with a single chaotic source
• Domino successive-deviation ghost imaging
• Formation mechanism of correspondence imaging with thermal light
• Ghost imaging for an occluded object
• Infrared single-pixel imaging utilising microscanning
• Forming images using conditioned partial measurements from reference arm in ghost imaging
• Is it necessary to achieve sub-wavelength interference with correlation?