From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 3176/CH4/EX4.4/Ex4_4.sce | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 3176/CH4/EX4.4/Ex4_4.sce

(limited to '3176/CH4/EX4.4/Ex4_4.sce')

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));
+
-- 
cgit