[Image-SIG] Finding image dimension

[andrea_gavana at tin.it]

Hello NG,

    I am using PIL to load and display some pictures (via 
wxPython) in a GUI. I have added the ability for the user to change 
the 
linear dimensions of the image (in pixels) and the quality of the 
image 
in order for the image to be saved in another file. I was 
wondering if 
is there a way to know in advance, based on the pixel 
dimensions 
specified by the user and by the image quality, which file 
size (in 
bytes) I will obtain for the new image (approximatively). Is 
there a 
way to obtain such result without actually saving the image?

Thanks 
for any hint.

Andrea.