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+//Ex2_3 
+//Typical Effects of Varying the Number of Intensity Levels in a digital Image
+// 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).
+gray=rgb2gray(imread("Ex2_3.png"));
+figure,ShowImage(gray,'Gray Image');
+title('Original Image');
+[nr nc]=size(gray);
+b=gray;
+level=[128 64 32 16 8 4 2];
+for x=1:length(level)
+k=level(x);
+for y=1:k    
+for i=1:nr
+    for j=1:nc
+        if(gray(i,j)>=((255/k)*(y-1)) & gray(i,j)<((255/k)*y))
+            b(i,j)=((255/k)*(y-1))+((255/k)/2);
+         end
+    end
+end
+end
+figure,ShowImage(b,'OutPut Image');
+title('Image With Less Number of Gray Level');
+end
+