… Speckle noise has generally been used in optical signal … However, in this paper, quantitative
analysis of speckle reduction … It was shown that the proposed method can reduce speckles …

… reduce far-field speckle noise in multimode fiber with a short cylindrical piezoelectric transducer
(… This technique can be adapted at a high modulation frequency, so the speckle patterns …

… Speckle reduction techniques which use vibrating multimode … using multimode fibers for
speckle reduction. Multimode fiber has … piezoelectric transducer to apply vibration and speckle …

… In conclusion, we experimentally studied the effective speckle noise reduction in a 50-μm-core
GI-MMF and a 200-μm-core HPCF using a cylindrical PZT, where the test fibers were …

… The MRT has a structure consisting of thin and thick piezoelectric plates, … transducer in the
mechanical sector probe of commercial ultrasonic diagnosis equipment, the speckle reduction …

… for the purpose of reducing speckle in ultrasonic images. The … and overlap, and the speckle
and resolution characteristics of … gradually increased with a decrease in subaperture size and …

… This moving density wave is excited by a piezoelectric transducer. The density grating diffracts
the laser beam into one or more diffraction orders. These diffraction orders are frequency-…

… the excitation of the piezoelectric transducer, the … to decrease the transmission of piezoelectric
vibration to the measurement system. The applied voltage to the piezoelectric transducer …

… The removal of noise using image processing techniques, … subtractive methods mainly
reduce background noise and … algorithm is the simultaneous removal of background noise and …

… far for noise reduction in speckle phase maps [3, 25]. In this study, we have used the
trigonometric filter for noise reduction, which is proved to be an effective method for filtering speckle …