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Image sharpening & de-noising using bilateral & adaptive bilateral filters-A comparative analysis

Jyoti.Shettar, Ekta.Maini, Shreelakshmi S, Shashi Raj K

Image restoration refers to the genre of techniques that aim to recover a high quality original image from a degraded version of that image given a specific model for degradation process. The two most common forms of degradation, an image suffers are loss of sharpness or blur, and noise. In this paper, an attempt has been made to first develop a sharpening method that increases the slope of edges without producing overshoot and undershoot, which renders clean, crisp, and artifact-free edges, thereby improving the overall appearance of the image. The second aspect of the problem is to address noise removal. A unified solution to both sharpness enhancement and noise removal is proposed using adaptive bilateral filter. The paper compares the result of bilateral & adaptive bilateral filter for image sharpening and de-noising.