Fig. 3From: Joint pre-processing framework for two-dimensional gel electrophoresis images based on nonlinear filtering, background correction and normalization techniquesTwo-dimensional gel electrophoresis – 2-DGE – image from a human urine sample (samp_05). a Original image. b 2-DGE image filtered using Wavelet Transform -WT. c 2-DGE image filtered using geometric nonlinear diffusion filtering - GNDFBack to article page