Median-type filters with model-based preselection masks

Lina García-Cabrera, M.José García-Salinas, Pedro L. Luque-Escamilla, José Martínez-Aroza, Juan F. Gómez Lopera, Ramón Román-Roldán
1996 Image and Vision Computing  
To remove impulsive noise, several variants of median-type filters are presented. They use some prior information provided by the probabilistic composition model of the class of the image being processed. This information is doubly applied; first, in elaborating a noise-estimation mask for the preselection of the pixels which must be filtered; and second, in the filtering process itself. The aim is to avoid the side-effect damage that median-type filters produce in processing the
more » ... d pixels. Experimental results are better than in the conventional median filter. * Corresponding author. 0262-8856/96/%15.00 0 1996 Elsevier Science B.V. All rights reserved PZZ SO262-8856(96)01084-O In this paper new median-type filters, called Mask-Model Filters, are introduced. The starting point is that a spatial filter damages some good pixels by itself, and this must be avoided. This problem is addressed by:
doi:10.1016/s0262-8856(96)01084-0 fatcat:5bc3ucr36jclbakk3uoxq6copi