Why am I not able to save JPEG images read using the URLREAD function?

I am attempting to save a JPEG image that I read using the URLREAD function. I am saving the file using the following code:

url = '<URL to JPEG Image>';

[imd, status] = urlread(url);

fd = fopen('image.jpg', 'w');

fwrite(fd, imd, 'uint8');

fclose(fd);

When I attempt to open the saved image ("image.jpg"), I do not see the image. Depending on the software used to view the image, it may appear as a black square, or an error message might appear informing me that the image is not in a valid format.

Answer 1

[MathWorks Support Team]

This bug has been fixed in MATLAB R14SP3. This issue has been fixed by adding a new functionality called URLWRITE, which saves the data in the format needed. Here is an example:

urlwrite('url to JPEG image','image.jpg')

For more information on URLWRITE, please see in the MATLAB documentation by typing following at the MATLAB command prompt:

doc urlwrite

For previous product releases:

There is a bug in MATLAB 6.5 (R13) in the way that URLREAD interprets binary data.

There are no workarounds.