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From: Dave on 2 Jul 2010 05:31

Hi,

Here I am saving each image every time when loops goes by 1 using an image counter 'imagecount', my intention is to save image when the count is even. I tried using imwrite() as the code I supplied here, but matlab popped up an error,I have given it.

Code I tried:
imcount = num2str(imagecount);
fid=fopen('C:\ipfilteredset','w');
name = strcat('\ipfilter',imcount);
namewithext = strcat(name,'.png');
filename = strcat('C:\ipfilteredset',namewithext);
fid1 = fopen(filename,'w');
imwrite(finaldestin,filename);
fclose(fid1)
fclose(fid);
Error:

??? Error using ==> imwrite at 394
Can't open file
"C:\ipfilteredset\ipfilter2.png" for writing.
You may not have write permission.
Error in ==> imarea>pushbutton6_Callback at
161
imwrite(finaldestin,filename);
Error in ==> gui_mainfcn at 96
feval(varargin{:});

Will there be any use if I use fullfile() with imwrite() ? How can I save an image into a folder??

Thank you in advance for your suggestions.


Regards,
Dave.
From: ImageAnalyst on 2 Jul 2010 07:43
Dave:
I prefer fullfile() but it won't make any difference in your case
because you already have the full file name. Are you sure that folder
exists? Check before out write with
if ~exist('C:\ipfilteredset, 'dir')
mkdir('C:\ipfilteredset);
end

or something like that.

But the real reason it fails is that you're opening the very same file
that imwrite is trying to create with fopen, which creates the file
and puts a lock on it so that when imwrite comes along, it can't do
anything because you have opened/locked that file. Just let imwrite
do its job without trying fopen() & fclose().
-ImageAnalyst

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