A survey on switching median filters for impulse noise removal

Impulse noise is one of the major problems in digital image processing. Impulse noise can corrupt the images and also damage the fine details in the image. Different filtering algorithms are applied on images to remove the impulse noise that are present in image during acquisition. Corrupted pixels in image take either the minimum or maximum gray level. Image denoising filters are based on the median filter. Survey on Variants of median filters like weighted median filter, adaptive switching median filter, triststate switching median filter, modified decision based unsymmentrictristate median filter are discussed in his paper.