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+//Ex3_15
+// Image Sharpning using Laplacian 
+// Version : Scilab 5.4.1
+// Operating System : Window-xp, Window-7
+//Toolbox: Image Processing Design 8.3.1-1
+//Toolbox: SIVP 0.5.3.1-2
+//Reference book name : Digital Image Processing
+//book author: Rafael C. Gonzalez and Richard E. Woods
+
+
+
+clc;
+close;
+clear;
+xdel(winsid())//to close all currently open figure(s).
+a=imread('Ex3_15.tif');
+[M N]=size(a);
+figure,ShowImage(a,'Original Image');
+title('Original Image','color','blue','fontsize',4);
+
+/////////////////////////// Laplacian Filtering /////////////////////////
+F=fspecial('laplacian',0);
+Image1=imfilter(a,F);
+figure,ShowImage(Image1,'Original Image');
+title('Filtered Image with Laplacian Mask','color','blue','fontsize',4);
+
+/////////////////////////// Laplacian Filtering /////////////////////////
+F=[1 1 1;1 -8 1;1 1 1];
+Image2=imfilter(a,F);
+figure,ShowImage(Image2,'Original Image');
+title('Filtered Image with Laplacian Mask','color','blue','fontsize',4);
+
+/////////////////////////// Laplacian Filtering /////////////////////////
+b=a-(1*Image1);
+figure,ShowImage(b,'Original Image');
+title('Filtered Image with Laplacian Mask','color','blue','fontsize',4);
+
+
+/////////////////////////// Laplacian Filtering /////////////////////////
+b=a-(1*Image2);
+figure,ShowImage(b,'Original Image');
+title('Filtered Image with Laplacian Mask','color','blue','fontsize',4);
+