problem facing in imwrite syntax

if true
  folder='C:\Users\Public\Videos\Sample Videos\pro\Ne';
for k = 2 : 10
% Get the base file name.
baseFileName = sprintf('img%d.jpg', k);
% Combine it with the folder to get the full filename.
fullFileName = fullfile(folder, baseFileName);
% Read the image file into an array.
imageArray = imread(fullFileName);
a=imageArray;
figure(1);
imshow(a); 
title('color image'); 
c=rgb2gray(a); 
b=imresize(c, [512 512]); 
figure(2);
imshow(b);
title('original gray scale image');
n=512;
k=1;
for i=1:1:n
for j=1:2:n
if (j<=n-1)
s(i,k)=(b(i,j)+b(i,j+1))/2;
d(i,k)=b(i,j)-b(i,j+1);
end
k=k+1;
end
k=1;
end
for i=1:1:n 
for j=1:1:n/2
b(i,j)=s(i,j);
b(i,j+n/2)=d(i,j);
end
end
for j=1:1:n/2
for i=1:2:n
if i<=n-1
s(k,j)=(b(i,j)+b(i+1,j))/2;
d(k,j)=b(i,j)-b(i+1,j);
end
k=k+1;
end
k=1;
end
for i=1:1:n/2 
for j=1:1:n/2
b(i,j)=s(i,j);
b(i+n/2,j)=d(i,j);
end
end
figure(3);
imshow(b); 
title('image after one level of compression')
for i=1:1:n/2 
for j=1:2:n/2
if (j<=n/2-1)
s(i,k)=(b(i,j)+b(i,j+1))/2;
d(i,k)=b(i,j)-b(i,j+1);
end
k=k+1;
end
k=1;
end
for i=1:1:n/2
for j=1:1:n/4
b(i,j)=s(i,j);
b(i,j+n/4)=d(i,j);
end
end
for j=1:1:n/4
for i=1:2:n/2
if i<=n/2-1
s(k,j)=(b(i,j)+b(i+1,j))/2;
d(k,j)=b(i,j)-b(i+1,j);
end
k=k+1;
end
k=1;
end
for i=1:1:n/4
for j=1:1:n/4
b(i,j)=s(i,j);
b(i+n/4,j)=d(i,j);
end
end
figure(4);
imshow(b);
title('image after two level of compression')
for i=1:1:n/4 
for j=1:2:n/4
if (j<=n/4-1)
s(i,k)=(b(i,j)+b(i,j+1))/2;
d(i,k)=b(i,j)-b(i,j+1);
end
k=k+1;
end
k=1;
end
for i=1:1:n/4
for j=1:1:n/8
b(i,j)=s(i,j);
b(i,j+n/8)=d(i,j);
end
end
for j=1:1:n/8
for i=1:2:n/4
if i<=n/4-1
s(k,j)=(b(i,j)+b(i+1,j)/2);
d(k,j)=b(i,j)-b(i+1,j);
end
k=k+1;
end
k=1;
end
for i=1:1:n/8
for j=1:1:n/8
b (i, j)=s(i,j);
b (i+n/8, j)=d(i,j);
end
end
b=imcrop(b,[0 0 64 64]);
figure (5);
imshow(b);
title('image after third level of compression')
b=imresize(b, [3456 4608]); 
imshow(b);
imwrite(b,'C:\Users\Public\Videos\Sample Videos\pro\Newr\im%d.jpg',k);
end

end

[Roberto]

Code not readable... please edit and clarify...

use the  {}Code button to get readable code
like{this}

[rohan]

sir i m attaching a file kindly look at it

[rohan]

if true
  % folder='C:\Users\Public\Videos\Sample Videos\pro\Ne';
for k = 2 : 10
% Get the base file name.
baseFileName = sprintf('img%d.jpg', k);
% Combine it with the folder to get the full filename.
fullFileName = fullfile(folder, baseFileName);
% Read the image file into an array.
imageArray = imread(fullFileName);
a=imageArray;
figure(1);
imshow(a); 
title('color image'); 
c=rgb2gray(a); 
b=imresize(c, [512 512]); 
figure(2);
imshow(b);
title('original gray scale image');
n=512;
k=1;
for i=1:1:n
for j=1:2:n
if (j<=n-1)
s(i,k)=(b(i,j)+b(i,j+1))/2;
d(i,k)=b(i,j)-b(i,j+1);
end
k=k+1;
end
k=1;
end
for i=1:1:n 
for j=1:1:n/2
b(i,j)=s(i,j);
b(i,j+n/2)=d(i,j);
end
end
for j=1:1:n/2
for i=1:2:n
if i<=n-1
s(k,j)=(b(i,j)+b(i+1,j))/2;
d(k,j)=b(i,j)-b(i+1,j);
end
k=k+1;
end
k=1;
end
for i=1:1:n/2 
for j=1:1:n/2
b(i,j)=s(i,j);
b(i+n/2,j)=d(i,j);
end
end
figure(3);
imshow(b); 
title('image after one level of compression')
for i=1:1:n/2 
for j=1:2:n/2
if (j<=n/2-1)
s(i,k)=(b(i,j)+b(i,j+1))/2;
d(i,k)=b(i,j)-b(i,j+1);
end
k=k+1;
end
k=1;
end
for i=1:1:n/2
for j=1:1:n/4
b(i,j)=s(i,j);
b(i,j+n/4)=d(i,j);
end
end
for j=1:1:n/4
for i=1:2:n/2
if i<=n/2-1
s(k,j)=(b(i,j)+b(i+1,j))/2;
d(k,j)=b(i,j)-b(i+1,j);
end
k=k+1;
end
k=1;
end
for i=1:1:n/4
for j=1:1:n/4
b(i,j)=s(i,j);
b(i+n/4,j)=d(i,j);
end
end
figure(4);
imshow(b);
title('image after two level of compression')
for i=1:1:n/4 
for j=1:2:n/4
if (j<=n/4-1)
s(i,k)=(b(i,j)+b(i,j+1))/2;
d(i,k)=b(i,j)-b(i,j+1);
end
k=k+1;
end
k=1;
end
for i=1:1:n/4
for j=1:1:n/8
b(i,j)=s(i,j);
b(i,j+n/8)=d(i,j);
end
end
for j=1:1:n/8
for i=1:2:n/4
if i<=n/4-1
s(k,j)=(b(i,j)+b(i+1,j)/2);
d(k,j)=b(i,j)-b(i+1,j);
end
k=k+1;
end
k=1;
end
for i=1:1:n/8
for j=1:1:n/8
b (i, j)=s(i,j);
b (i+n/8, j)=d(i,j);
end
end
b=imcrop(b,[0 0 64 64]);
figure (5);
imshow(b);
title('image after third level of compression')
b=imresize(b, [3456 4608]); 
imshow(b);
imwrite(b,'C:\Users\Public\Videos\Sample Videos\pro\Newr\im%d.jpg',k);
end

end

Answer 1

[Roberto]

i think it migth have to do with the %d in the string

try using a prearranged string

format = 'jpg';
str = ['C:\Users\Public\Videos\Sample Videos\pro\Newr\im' num2str(someVar) '.jpg'] ;
imwrite(b,str,format) ;

or use a uiputfile function

[rohan]

the code ran..thnku for the help bt still its save the same image again and again..what i need id to save diff images

[Image Analyst]

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

[rohan]

sir, can u edit my code and then send me..i tried sme ways bt still unsucessful

Answer 2

[Image Analyst]

rohan, you can't do this:

imwrite(b,'C:\Users\Public\Videos\Sample Videos\pro\Newr\im%d.jpg',k);

imwrite is not like sprintf. You hav eto do it in two different steps:

filename = sprintf('C:\Users\Public\Videos\Sample Videos\pro\Newr\im%d.jpg',k);
imwrite(b,filename);

as I already showed you a few days ago here: http://www.mathworks.com/matlabcentral/answers/126979#comment_210616 You never answered that so I guess you didn't go back and check or you just ignored it.

[rohan]

sir ,

i have wrked on ur suggestion and finally moved on further to this code...kindly have a look at it..the images has been sucessfully compressed..what i need is to make video from this image...
can u help me in this sir.

[Image Analyst]

Since I don't have 901 images, I can offer just a few suggestions.

1. Please indent your code. Type control-a, then control-i to properly indent it.
2. ADD COMMENTS. No one can follow this alphabet soup of code without help.
3. The format input argument in imwrite is not needed - it figures it out automatically from the filename.
4. Use descriptive variable names to make it easier to follow. Names like row, column, originalImage, compressedImage, etc., not single letter variables like i,j,b,s,d,k, n, c, and a. I don't even want to attempt to remember what all those mean.

After you put in those fixes, if you want me to look at your improved code, I can do that.