title: Monte Carlo simulation for speckle reduction by a moving diffuser on the natural test image.
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.
authors.forename: Shigeo
authors.initials: S
authors.lastname: Kubota
authors.forename: Koji
authors.initials: K
authors.lastname: Suzuki
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Tomita
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Fukui