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Finding problem in retrieving output images from a function

Asked by Febin Benjamin on 23 Jul 2013

This is my code..... The main body accepts images and filter matrix and passes this as inputs to a function called MyFilter.....

m = input('Enter number of rows: ');
n = input('Enter number of columns: ');
for i = 1:m
for j = 1:n
str = ['Enter element in row ' num2str(i) ', col ' num2str(j) ': '];
A(i,j) = input(str);
end
end
fontSize = 20;
for k = 1:25
   tifFilename = sprintf('%d.tif', k);
   if ~exist(tifFilename, 'file')
      fprintf('%s not found.\n', tifFilename);
      continue;
   end
   rgbImage = imread(tifFilename);
   grayImage = rgb2gray(rgbImage );
   BW = Myfilter(grayImage,A);
   figure,imshow(rgbImage);
   title('Color Image', 'FontSize', fontSize);
   figure,imshow(BW);
   title('Binary Edge Image', 'FontSize', fontSize);
end

And this is the function MyFilter which I am calling......

i = imread(grayImage);
filter = A;
[x y] = size(i);
g = double(i);
k= double(i);
h = zeros(256,256);
for xi = 2 : 255
    for yi = 2 : 255
       i(xi,yi)=((g(xi,yi)*filter(2,2) + g(xi,yi-1)*filter(2,1) + g(xi+1,yi-1)*filter(3,1) + g(xi+1,yi)* filter(3,2) + g(xi+1,yi+1)*filter(3,3)+ g(xi-1,yi+1)*filter(1,3)+g(xi-1,yi)*filter(1,2)+ g(xi-1,yi-1)*filter(1,1)+g(xi+1,yi)*filter(3,2)))/2;
       %h(xi,yi)
    end
end

How can i get the images back from the called function after they are processed inside the function?

0 Comments

Febin Benjamin

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2 Answers

Answer by Image Analyst on 23 Jul 2013
Accepted answer

Have the first line be

function i = MyFilter(A)

I advise you to use other names for the variables you call "i" and "filter" since they have special built-in meanings for MATLAB and you shouldn't overwrite them with your variables.

1 Comment

Febin Benjamin on 23 Jul 2013

Where should i write that? In main or Function?

Image Analyst
Answer by Image Analyst on 23 Jul 2013

Have the first line be

function i = MyFilter(A)

I advise you to use other names for the variables you call "i" and "filter" since they have special built-in meanings for MATLAB and you shouldn't overwrite them with your variables.

0 Comments

Image Analyst

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