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Salt and pepper noise, image filtering, review, filter comparison, state of art
Salt and pepper noise is a type of impulse noise, where certain amount of black and white dots appear in the image. The intensity is accumulated in 8 bit integer, giving 256 possible gray levels in the range (0 – 255).In this range salt and pepper noise takes either minimum or maximum intensity. Positive impulse appears as white (salt) points with intensity '255' and negative impulse appears as black (pepper) points with intensity '0' respectively. Salt and pepper noise removal is not an easy task mostly when noise density in the contaminated image is high and restoration of image quality is essential. Different filters like MF, SMF, AMF, PSMF, DBA, DBUTMF, and MDBUTMF and so on are noticed useful for taking away low, moderate and high density salt and pepper noise. The purpose of this paper is to present these filters first and then revise their art to enhance their performances and usefulness. The comparison shows that some of these filters are very fruitful in some particular noise density levels and hence classified applications on these situations are recommended based on the output of investigations.
Aritra Bandyopadhyay, Shubhendu Banerjee, Atanu Das, Rajib Bag,"A Relook and Renovation over State-of-Art Salt and Pepper Noise Removal Techniques", IJIGSP, vol.7, no.9, pp.61-69, 2015. DOI: 10.5815/ijigsp.2015.09.08
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