In this work, two adaptive filter algorithms for sharpness enhancement and noise removal have been evaluated. A modification to the Adaptive Bilateral Filter (ABF) method have been carried out using the difference of gaussians as the pixel classification algorithm. A metric comparison with adaptive Non lineal Complex Diffusion Filter (NCDF) algorithm has been applied using three methods: MSE (mean square error), ENL (equivalent number of looks) and CNR (Contrast to noise ratio). Results showed that the proposed modification outperforms all the others using the MSE, CNR and ENL (in light areas) criteria. However, the Adaptive NCDF obtains the best result in the dark areas of the image.
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