Get pixel dimension of an image

[ldima]

Hello everyone.
I have an image of a certain size,say 640x480.
It's possible to get the pixel dimension in mm from that?
Thanks all!

[viliml]

I don't know what does this have to do with c++, but if you know your monitor's resolution, height and width, you can calculate that, but it's different for every computer.

[ldima]

Yes,sorry viliml..thank you for replying anyway.
I'm coding in c++ so I thought I can post here..
Anyway what I'm doing is to load an image and then i have to obtain pixel dimension in mm of that image to do other stuff.
How can i calculate this?My computer is 1440x900,but I don't want it to be computer-dependent..it's not possible?

[viliml]

I don't think that's possible. Every computer has it's own difeerent size and resolution, and I don't know of anything that can simply give you the computer's size and resolution, so you can make it for your computer, but not for most of the others

[ldima]

ok,what a pity :( ..
thank you!