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Matlab image processing homework help
1. MATLAB IMAGE PROCESSING (SAMPLE ASSIGNMENT)
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Generalised Sobel Filter for Edge Detection
Program for generating edge images using sobel filter of any size
GSobel(img,Wsize)
%Program for creating generalised Sobel operator
%Authors : Jeny Rajan, K.Kannan
%Medical Imaging Research Group, NeST, Trivandrum
%http://jenyrajan.googlepages.com/
%http://kannan.keizer.googlepages.com/kannankeizer
%This program can be used to generate sobel filter of any order
% Usage [E Mx My]=Gsobel(img,Wsize)
% eg. [E Mx My]=Gsobel(img,5)
% E - Resultant Edge image generated with sobel filter of window size Wsize
% Mx & My - Horizontal and Vertical Masks
% img - input image
% Wsize - Filter window size
function [E Mx My]= GSobel(img,Wsize)
for i=1:Wsize
Sx(i)=factorial((Wsize-1))/((factorial((Wsize-1)-(i-1)))*(factorial(i-1)));
Dx(i)=Pasc(i-1,Wsize-2)-Pasc(i-2,Wsize-2);
end
Sy=Sx';
Dy=Dx';
Mx=Sy(:)*Dx;
My=Mx';
Ey=imfilter(double(img),My,'symmetric');
Ex=imfilter(double(img),Mx,'symmetric');
E=sqrt(Ex.^2+Ey.^2);
figure,imshow(img,[]),title('Original Image');
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