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(a) Standard pseudothermal GI two-detectors setup. A copy of the speckle field which impinges on the object is imaged with a CCD camera, and correlated with the intensity measured by a bucket detector. (b) The computational GI single-detector setup used in this work. A pseudothermal light beam is generated by applying controllable random phase masks with a spatial light modulator. The object image is obtained by correlating the intensities measured by the bucket detector, with the calculated field at the object plane.
Experimental reconstruction of a double-slit transmission plate. Top panel: conventional GI reconstruction with 256 realizations (a) and 512 realizations (b). Bottom panel [(c) and (d)]: CS reconstruction using the same experimental data as in (a) and (b). The increase in SNR using CS reconstruction is by a factor of 4.4 in (c) and 4.0 in (d).
(a) Experimental GI reconstruction of a transmission plate of the Hebrew letter Aleph from 1024 measurements. (c) Same as (a) but utilizing CS reconstruction, yielding 3.5 times higher SNR. (Inset: the object’s transmission image). [(b) and (d)] Simulated GI and CS reconstructions of a grayscale portrait of H. Nyquist, using 800 measurements (60% the Nyquist limit).
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