Monte Carlo simulation for speckle reduction by a moving diffuser on the natural test image

Applied Optics
Shigeo KubotaTatsuo Fukui

Abstract

We present a precise Monte Carlo simulation of speckle reduction on the natural test image, which will serve as a digital image embedded with speckle under control. In simulating the conditioned time averaging for the square modulus of the random phasor sum in speckle reduction by a moving diffuser, after initial upconversion of the test image amplitudes, downconversion of their product with an independent set of time-varying, random phasors is repeated to sum up the square moduli. Validity of the simulation is rigorously confirmed on the test image array consisting of random real amplitude. As a more practical digital test image for speckle evaluation, the well-known Lena test image is promising as the standard for this application from the point of view of sufficiently small excess noise, primarily due to low pixel-neighbor correlations.

References

Aug 11, 2010·Applied Optics·Shigeo Kubota, Joseph W Goodman
Apr 4, 2014·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Damien P Kelly

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