Combining the discrete wavelet transforms and rank-order based filters for image restoration
Samvel M. Atourian · Optical Engineering · 1998
We propose a filter structure formed as the superposition of an impulse removal filter, based on a modifiedK-nearest-neighbor op- eration and discrete wavelet transform based noise reduction. This filter removes impulsive and Gaussian noise and mixed noises well. We also suggest an efficient architecture for implementing the impulse removal filter used in this structure. © 1998 Society of Photo-Optical Instrumentation Engi- neers. (S0091-3286(98)02301-0)