Error using imwrite (line 463) Can't open file "C:\Program Files\MATL​AB\R2011b\​bin\frames​\fr1.jpj" for writing. You may not have write permission. Error in manzil (line 29) imwrite(im​g,outputFu​llFileName​,'jpg');

2 次查看（过去 30 天）
Mohd Aquib
Mohd Aquib 2013-5-23
m executing the below code and obtaining error like this
  1. PERMISSION IS DENIED FOR MKDIR
  2. Error using imwrite (line 463) Can't open file "C:\Program Files\MATLAB\R2011b\bin\frames\fr1.jpj" for writing. You may not have write permission. Error in extractframe (line 29) imwrite(img,outputFullFileName,'jpg');
SO WHAT I SHD DO???
if true
% clc ; % clearing the command window
n = input(' Enter the number of photos to be taken: ');
intervel = input(' Enter the time(seconds) gap between succeessive photos: ');
photosave = input(' Do you want to save the files(y/n): ','s');
disp('Please wait...');
outputFolder = fullfile(cd, 'Test');
if ~exist(outputFolder, 'dir')
clc ; % clearing the command window
n = input(' Enter the number of photos to be taken: ');
intervel = input(' Enter the time(seconds) gap between succeessive photos: ');
photosave = input(' Do you want to save the files(y/n): ','s');
disp('Please wait...');
outputFolder = fullfile(cd, 'frames');
% if ~exist(outputFolder, 'dir')
% mkdir(outputFolder);
% end
obj = videoinput('winvideo',1);
preview(obj);
disp('Press Enter to start after webcam initialization.');
pause;
disp('First shot will taken after 3 second');
pause(3);
for i=1:n
img=getsnapshot(obj);
image(img);
if(photosave == 'y')
outputBaseFileName = sprintf('fr%d.jpj',i);
outputFullFileName = fullfile(outputFolder, outputBaseFileName);
imwrite(img,outputFullFileName,'jpg');
end
pause(intervel);
end
closepreview;
disp('The program successfully taken the photos');
disp('Done.');mkdir(outputFolder);
end
obj = videoinput('winvideo',1);
preview(obj);
disp('Press Enter to start after webcam initialization.');
pause;
disp('First shot will taken after 1 second');
pause(1);
for i=1:n
img=getsnapshot(obj);
image(img);
if(photosave == 'y')
outputBaseFileName = sprintf('fr%d.png',i);
outputFullFileName = fullfile(outputFolder, outputBaseFileName);
imwrite(img,outputFullFileName,'jpg');
end
pause(intervel);
end
closepreview;
disp('The program successfully taken the photos');
disp('Done.');
end

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采纳的回答

Image Analyst
Image Analyst 2013-5-24
Unlike Windows XP, writing to anything under the Program Files folder in Windows 7 is practically prohibited, though there are ways around it. You're expected to keep all your documents on a secondary hard drive (like I do), or in the "C:\Users\yourLoginName\Documents" folder. Replace this:
outputFolder = fullfile(cd, 'Test');
with this:
outputFolder = 'C:\Users\Mohd\Test'; % or frames instead of test.

更多回答（1 个）

Walter Roberson
Walter Roberson 2013-5-24
编辑：Walter Roberson 2013-5-24
Start from a different directory so that you are not trying to write underneath the MATLAB directory

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