Image Filtering using All Neighbor Directional Weighted Pixels: Optimization using Particle Swarm Optimization
This addresses noise removal in images for applications like medical imaging or photography, but it is incremental as it builds on existing filtering and optimization techniques.
The paper tackled image denoising for random-valued impulse noise by proposing a two-step method using all neighbor directional weighted pixels for detection and particle swarm optimization for parameter tuning, achieving better denoising and detail preservation in highly corrupted images.
In this paper a novel approach for de noising images corrupted by random valued impulses has been proposed. Noise suppression is done in two steps. The detection of noisy pixels is done using all neighbor directional weighted pixels (ANDWP) in the 5 x 5 window. The filtering scheme is based on minimum variance of the four directional pixels. In this approach, relatively recent category of stochastic global optimization technique i.e., particle swarm optimization (PSO) has also been used for searching the parameters of detection and filtering operators required for optimal performance. Results obtained shows better de noising and preservation of fine details for highly corrupted images.