Thread Subject:

Saveas slow

I am using matlab to generate a report containing a few hundred images.

The slowest part of my program is when I save the images using the following code:

saveas(gcf,full_path,'png');

where full_path is a string containing the filename.

I have tried using Visible Off. And running the code in a parallel loop. But it is still slow. It takes about 0.2 seconds to save an image. I have also tried using a ramdisk, but that did not help.

Are there any better ways of saving my images?

Thanks.

On 6/22/2012 5:18 AM, Jonathan wrote:
> I am using matlab to generate a report containing a few hundred images.
>
> The slowest part of my program is when I save the images using the following code:
>
> saveas(gcf,full_path,'png');
>
> where full_path is a string containing the filename.
>
> I have tried using Visible Off. And running the code in a parallel loop.
>But it is still slow. It takes about 0.2 seconds to save an image.
>I have also tried using a ramdisk, but that did not help.
>
> Are there any better ways of saving my images?
>
> Thanks.
>

try export_fig

http://www.mathworks.com/matlabcentral/fileexchange/23629

--Nasser

"Jonathan" wrote:
> I am using matlab to generate a report containing a few hundred images.
>
> The slowest part of my program is when I save the images using the following code:
>
> saveas(gcf,full_path,'png');
>
> where full_path is a string containing the filename.
>
> I have tried using Visible Off. And running the code in a parallel loop. But it is still slow. It takes about 0.2 seconds to save an image. I have also tried using a ramdisk, but that did not help.
>
> Are there any better ways of saving my images?
>
> Thanks.

If you want speed then the fastest way is to use getframe and imwrite. However, this means the figure needs to remain visible on the desktop.