Problem with image size

Hello,

My problem is very simple, but I have no simple solution.

I load a big image, I resizes it but no memory is freed.

I do this :

NSImage *img = [[NSImage alloc] initWithContentsOfFile: @"monImage.jpg"];
[img setScalesWhenResized: YES];
[img setSize: NSMakeSize(100, 100)];

Here the memory is not freed, somebody has a solution ?

Thanks.

Nicolas