updated the code

1 files changed, 60 insertions, 66 deletions

diff --git a/3176/CH4/EX4.24/Ex4_24.sce b/3176/CH4/EX4.24/Ex4_24.sce
index 1e50e6749..aa4ec99fc 100644
--- a/3176/CH4/EX4.24/Ex4_24.sce
+++ b/3176/CH4/EX4.24/Ex4_24.sce
@@ -1,66 +1,60 @@
-//Ex4_24

-// Enhancement of Corrupted Cassini Saturn Image by Notch Filtering

-// 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).

-

-function[H]=notchfilter(M,N,W)//notchfilter is used to filter an image .

-        H=ones(M,N);

-        H(1:ceil(M/2-5),ceil(N/2-W/2):ceil(N/2+W/2))=0;

-        H(ceil(M/2+5):M,ceil(N/2-W/2):ceil(N/2+W/2))=0;    

-

-endfunction

-

-

-

-///////////////////////////////////   Main Programm   ////////////////////////////////

-a=imread("Ex4_24.tif");

-//gray=rgb2gray(a);

-gray=im2double(a);

-

-figure,ShowImage(gray,'Gray Image');

-title('Original Image','color','blue','fontsize',4);

-[M,N]=size(gray);

-

-h=fft2(gray);//fft2() is used to find 2-Dimensional Fast Fourier Transform of an matrix

-i=log(1+abs(h));

-in=fftshift(i);//fftshift() is used to rearrange the fft output, moving the zero frequency to the center of the spectrum.

-inm=mat2gray(in)

-figure,ShowImage(inm,'Frequency Spectrum');

-title('Frequency Spectrum','color','blue','fontsize',4);

-

-filt=notchfilter(M,N,7); // User Define Function which generate Filter Mask Corresponding to Low Frequency

-filt_pass=1-filt;

-//filt_shift=fftshift(filt);

-figure,ShowImage(filt,'Filter Mask');

-title('Filter Mask (Band stop) to Specific Cut-Off Frequency','color','blue','fontsize',4);

-

-n=filt.*fftshift(h);//Multiply the Original Spectrum with the Filter Mask.

-Image_filter=real(ifft(fftshift(n)));

-Image_filter=mat2gray(Image_filter)

-figure,ShowImage(Image_filter,'Filtered Image');

-title('Filtered Image with Specific Cut-Off Frequency','color','blue','fontsize',4);

-

-

-figure,ShowImage(filt_pass,'Filter Mask');

-title('Filter Mask (Band Pass) to Specific Cut-Off Frequency','color','blue','fontsize',4);

-

-n=filt_pass.*fftshift(h);//Multiply the Original Spectrum with the Filter Mask.

-Image_filter=real(ifft(fftshift(n)));

-Image_filter=mat2gray(Image_filter)

-figure,ShowImage(Image_filter,'Filtered Image');

-title('Filtered Image (Noise Pattern) with Specific Cut-Off Frequency','color','blue','fontsize',4);

-

-

-

-

-

-

+//Ex4_24
+// Enhancement of Corrupted Cassini Saturn Image by Notch Filtering
+// 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).
+
+function[H]=notchfilter(M,N,W)//notchfilter is used to filter an image .
+        H=ones(M,N);
+        H(1:ceil(M/2-5),ceil(N/2-W/2):ceil(N/2+W/2))=0;
+        H(ceil(M/2+5):M,ceil(N/2-W/2):ceil(N/2+W/2))=0;    
+
+endfunction
+
+
+
+///////////////////////////////////   Main Programm   ////////////////////////////////
+a=imread("Ex4_24.tif");
+//gray=rgb2gray(a);
+gray=im2double(a);
+
+figure,ShowImage(gray,'Gray Image');
+title('Original Image','color','blue','fontsize',4);
+[M,N]=size(gray);
+
+h=fft2(gray);//fft2() is used to find 2-Dimensional Fast Fourier Transform of an matrix
+i=log(1+abs(h));
+in=fftshift(i);//fftshift() is used to rearrange the fft output, moving the zero frequency to the center of the spectrum.
+inm=mat2gray(in)
+figure,ShowImage(inm,'Frequency Spectrum');
+title('Frequency Spectrum','color','blue','fontsize',4);
+
+filt=notchfilter(M,N,7); // User Define Function which generate Filter Mask Corresponding to Low Frequency
+filt_pass=1-filt;
+//filt_shift=fftshift(filt);
+figure,ShowImage(filt,'Filter Mask');
+title('Filter Mask (Band stop) to Specific Cut-Off Frequency','color','blue','fontsize',4);
+
+n=filt.*fftshift(h);//Multiply the Original Spectrum with the Filter Mask.
+Image_filter=real(ifft(fftshift(n)));
+Image_filter=mat2gray(Image_filter)
+figure,ShowImage(Image_filter,'Filtered Image');
+title('Filtered Image with Specific Cut-Off Frequency','color','blue','fontsize',4);
+
+
+figure,ShowImage(filt_pass,'Filter Mask');
+title('Filter Mask (Band Pass) to Specific Cut-Off Frequency','color','blue','fontsize',4);
+
+n=filt_pass.*fftshift(h);//Multiply the Original Spectrum with the Filter Mask.
+Image_filter=real(ifft(fftshift(n)));
+Image_filter=mat2gray(Image_filter)
+figure,ShowImage(Image_filter,'Filtered Image');
+title('Filtered Image (Noise Pattern) with Specific Cut-Off Frequency','color','blue','fontsize',4);
\ No newline at end of file