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how save produced images in loop

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nadia
nadia 2014-11-8
评论： Image Analyst 2014-11-8
hi i have a loop and produce blocks 32*32 with zeros now i want to save them in special folder how can i do it?
  1 个评论
nadia
nadia 2014-11-8
编辑：nadia 2014-11-8
i use this code
for i=1:4
b=zeros(32,32);
xx=sprintf('F:\b\i%d.bmp',i);
imwrite(b,xx,'bmp');
end
but it says Can't open file "F" for writing. You may not have write permission. please help me

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Geoff Hayes
Geoff Hayes 2014-11-8
Nadia - you are using backslashes in your string which is probably generating the following warnings
Warning: Control Character '\i' is not valid. See 'doc sprintf' for control characters valid in the format string.
Instead, build the filename separately from the path, and then use fullfile to build the full file name (with path) as
pathName = 'F:\b';
for k=1:4
b = zeros(32,32);
fileName = fullfile(pathName,sprintf('i%d.bmp',k));
imwrite(b,fileName);
end
Your file names will look something like
F:\b\i1.bmp
F:\b\i2.bmp
F:\b\i3.bmp
F:\b\i4.bmp
Note that I replaced your index of i with k since i (and j) are also used by MATLAB to represent the imaginary number. I also removed the bmp input argument to imwrite since the image file extension has already been specified in the file name.
  2 个评论
nadia
nadia 2014-11-8
thank you very much for your helps
Image Analyst
Image Analyst 2014-11-8
Or you can just use forward slashes. Windows understands forward slashes just fine - no need to use backslashes.

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