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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /3176/CH4/EX4.4/Ex4_4.sce | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '3176/CH4/EX4.4/Ex4_4.sce')
| -rw-r--r-- | 3176/CH4/EX4.4/Ex4_4.sce | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/3176/CH4/EX4.4/Ex4_4.sce b/3176/CH4/EX4.4/Ex4_4.sce new file mode 100644 index 000000000..352069137 --- /dev/null +++ b/3176/CH4/EX4.4/Ex4_4.sce @@ -0,0 +1,36 @@ +//Ex4_4
+// The Mechanics of Computing the DFT
+//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=[1 2 4 4];
+//b=fft2(a);
+disp('Original Signal:')
+disp(a);
+M=length(a);
+for i=1:M
+ b(i)=0;
+ for j=1:M
+ b(i)=b(i)+(a(j)*exp((-%i*2*%pi*(i-1)*(j-1)/M)));
+ end
+end
+disp('DFT of Signal:')
+disp(b);
+
+for i=1:M
+ d(i)=0;
+ for j=1:M
+ d(i)=d(i)+((b(j)*exp((%i*2*%pi*(i-1)*(j-1)/M)))/M);
+ end
+end
+disp('IDFT:')
+disp(abs(d));
+
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