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+//Ex4_8

+// Illustration of Jaggies in Image Shrinking

+//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("Ex4_8.tif");

+figure,ShowImage(a,'Gray Image');

+title('Original Image [1024 1024]','color','blue','fontsize',4);

+//[M,N]=size(a);

+b=imresize(a,[256 256],'bicubic');

+//figure,ShowImage(b,'Gray Image');

+//title('Resize Image [256 256] with Bicubic Interpolation');

+[M,N]=size(b);

+d=[];

+f=[]

+for i=1:N

+    temp=b(:,i);      

+    d=[d temp temp temp temp];  

+end

+for i=1:M

+    temp=d(i,:);      

+    f=[f;temp;temp;temp;temp];  

+end

+figure,ShowImage(f,'Gray Image');

+title('Resize Image [1024 1024] with Pixels Replication','color','blue','fontsize',4);

+

+

+///////////////////////////  Averaging Approach to Reduce Jaggies Effect  ////////////////

+filt=fspecial('average',5);

+a_filter=imfilter(a,filt);

+b=imresize(a_filter,[256 256],'bicubic');

+//figure,ShowImage(b,'Gray Image');

+//title('Resize Image [256 256] with Bicubic Interpolation');

+[M,N]=size(b);

+d=[];

+f=[]

+for i=1:N

+    temp=b(:,i);      

+    d=[d temp temp temp temp];  

+end

+for i=1:M

+    temp=d(i,:);      

+    f=[f;temp;temp;temp;temp];  

+end

+figure,ShowImage(f,'Gray Image');

+title('Resize Image [1024 1024] with Pixels Replication After Averaging','color','blue','fontsize',4);

+