It is empirically observed that Gaussian filter with (J = 6,
Fig. 4(b) shows an example of filtered document image
by frequency selective method using F£ of the document
image shown in Fig. 4(a). The visual importance of the textual
symbols is drastically reduced compared to graphical regions
present in the document image. The proposed frequency selective
filtering using F£ is promising as it can retain pixels
of graphical regions with high spatial frequency and high
chromaticity properties.