is it possible to adjust the codes such a way that it'l read all sizes of images

 is it possible to adjust the codes such a way that it'l read all sizes of images   currently its taking only 11kb

function out=load_database();
% We load the database the first time we run the program.

persistent loaded;
persistent w;
if(isempty(loaded))
    v=zeros(10304,400);
    for i=1:40
        cd(strcat('s',num2str(i)));
        for j=1:10
            a=imread(strcat(num2str(j),'.pgm'));
            v(:,(i-1)*10+j)=reshape(a,size(a,1)*size(a,2),1);
        end
        cd ..
    end
    w=uint8(v); % Convert to unsigned 8 bit numbers to save memory. 
end
loaded=1;  % Set 'loaded' to aviod loading the database again. 
out=w;

[Walter Roberson]

Is it certain that each image in a series will be the same size within the series?

[geethi]

sir i decoded that problem...but now one error is comin

??? Index exceeds matrix dimensions.

Error in ==> frs at 33
*title('Looking for ...','FontWeight','bold','Fontsize',16,'color','red');*

main pgm is:

    w=load_database();

prompt={'compare'}; 
title='IMAGE INPUT';
ans=inputdlg(prompt,title);
if ~isempty(ans{1})
r1 = str2num(ans{1});
if isempty(r1)
ri =round (400*rand(1,1));
end
end

r=w(:,r1);                          
v=w(:,[1:r1-1 r1+1:end]);           
N=20;                               
O=uint8(ones(1,size(v,2))); 
m=uint8(mean(v,2));                 
vzm=v-uint8(single(m)*single(O));   
L=single(vzm)'*single(vzm);
[V,D]=eig(L);
V=single(vzm)*V;
V=V(:,end:-1:end-(N-1));            

cv=zeros(size(v,2),N);
for i=1:size(v,2);
    cv(i,:)=single(vzm(:,i))'*V;    
end

subplot(121); 
imshow(reshape(r,112,92));
*title('Looking for ...','FontWeight','bold','Fontsize',16,'color','red');*

subplot(122);
p=r-m;                              
s=single(p)'*V;
z=[];
for i=1:size(v,2)
    z=[z,norm(cv(i,:)-s,2)];
    if(rem(i,20)==0),imshow(reshape(v(:,i),112,92)),end;
    drawnow;
end

[a,i]=min(z);
subplot(122);
imshow(reshape(v(:,i),112,92));title('Found!','FontWeight','bold','Fontsize',16,'color','red');

[pooja]

i am also having a similar problem with using images of diff sizes... can u pls tell hw u solved the problem???

[Image Analyst]

Your problem may not be exactly the same. State your problem and show your code in a new and totally new and different question.

[pooja]

i am using the same code i downloaded frm sumwhere...i need to modify it in order to be able to use images of diff sizes...i am modifying the code to take jpeg images rather than pgm!!!

[Image Analyst]

Sorry - I don't know what you want to do. Why don't just call imresize()?

[pooja]

function out=load_database();
  % We load the database the first time we run the program.
  persistent loaded;
  persistent w;
  if(isempty(loaded))
      v=zeros(10304,400);
      for i=1:40
          cd(strcat('s',num2str(i)));
          for j=1:10
              a=imread(strcat(num2str(j),'.pgm'));
              v(:,(i-1)*10+j)=reshape(a,size(a,1)*size(a,2),1);
          end
          cd ..
      end
      w=uint8(v); % Convert to unsigned 8 bit numbers to save memory. 
  end
  loaded=1;  % Set 'loaded' to aviod loading the database again. 
  out=w;

sir i want to modify this code in order to make it accept jpeg images of various sizes rather than only accepting pgm images of 11kb...

the error i m facing is..

Error in ==> load_database at 14 v(:,(i)*6+j)=reshape(a,size(a,1)*size(a,2),1);

please help..i do not knw much of matlab...

[Image Analyst]

Please start a new question so we don't keep bugging geethi with new emails for your question.

[Walter Roberson]

The jpeg is probably RGB, a 3-dimensional array whose total size is size(a,1) * size(a,2) * size(a,3). You can recode as

v(:,(i)*6+j) = a(:);

Answer 1

[Image Analyst]

You need to either make v a cell array, so that each element would be an image of a different size, or you need to call imresize before you stuff it into a column of v (if v is to remain just a regular numerical array).

[geethi]

sir i decoded that problem...but now one error is comin

??? Index exceeds matrix dimensions.

Error in ==> frs at 33 title('Looking for ...','FontWeight','bold','Fontsize',16,'color','red');

main pgm is:

   w=load_database();

prompt={'compare'}; 
title='IMAGE INPUT';
ans=inputdlg(prompt,title);
if ~isempty(ans{1})
r1 = str2num(ans{1});
if isempty(r1)
ri =round (400*rand(1,1));
end
end

r=w(:,r1);                          
v=w(:,[1:r1-1 r1+1:end]);           
N=20;                               
O=uint8(ones(1,size(v,2))); 
m=uint8(mean(v,2));                 
vzm=v-uint8(single(m)*single(O));   
L=single(vzm)'*single(vzm);
[V,D]=eig(L);
V=single(vzm)*V;
V=V(:,end:-1:end-(N-1));            

cv=zeros(size(v,2),N);
for i=1:size(v,2);
    cv(i,:)=single(vzm(:,i))'*V;    
end

subplot(121); 
imshow(reshape(r,112,92));
*title('Looking for ...','FontWeight','bold','Fontsize',16,'color','red');
 *
subplot(122);
p=r-m;                              
s=single(p)'*V;
z=[];
for i=1:size(v,2)
    z=[z,norm(cv(i,:)-s,2)];
    if(rem(i,20)==0),imshow(reshape(v(:,i),112,92)),end;
    drawnow;
end

[a,i]=min(z);
subplot(122);
imshow(reshape(v(:,i),112,92));title('Found!','FontWeight','bold','Fontsize',16,'color','red');

[Image Analyst]

Looks like it thinks title() is one of your variables instead of the built-in function. Set a breakpoint at that line and say

k>> whos title
k>> which -all title

and tell us what it says. You probably redefined title() to be a variable.

Answer 2

[Md Fakhrul Alam Sajib]

How to make v a cell array in this code. I want to adjust this codes such a way that it will read all sizes of images. Could anyone explain?

function out=load_database();
% We load the database the first time we run the program.

persistent loaded;
persistent w;
if(isempty(loaded))
    v=zeros(10304,400);
    for i=1:40
        cd(strcat('s',num2str(i)));
        for j=1:10
            a=imread(strcat(num2str(j),'.pgm'));
            v(:,(i-1)*10+j)=reshape(a,size(a,1)*size(a,2),1);
        end
        cd ..
    end
    w=uint8(v); % Convert to unsigned 8 bit numbers to save memory. 
end
loaded=1;  % Set 'loaded' to aviod loading the database again. 
out=w;

[Image Analyst]

To make v a cell array, use braces instead of parentheses. See the FAQ: http://matlab.wikia.com/wiki/FAQ#What_is_a_cell_array.3F

[Md Fakhrul Alam Sajib]

Thank you. Is it correct way to make v a cell array? I am still getting this error....

 Error using reshape,
To RESHAPE the number of elements must not change.
Error in load_database (line 12)
v(:,(i-1)*10+j)=reshape(a,size(a,1)*size(a,2),1);

function out=load_database()
    % We load the database the first time we run the program.

      persistent loaded;
      persistent w;
      if(isempty(loaded))
          v={zeros(10304,400)};
          for i=1:40
              cd(strcat('s',num2str(i)));
              for j=1:10
                  a=imread(strcat(num2str(j),'.pgm'));
                  v(:,(i-1)*10+j)=reshape(a,size(a,1)*size(a,2),1);
              end
              cd ..
          end
          w=uint8(v); % Convert to unsigned 8 bit numbers to save memory. 
      end
      loaded=1;  % Set 'loaded' to aviod loading the database again. 
      out=w;

[Md Fakhrul Alam Sajib]

Sir, how to use imresize() function to solve this error?