w.o actually retaking the picture with a better camera?
Like can you do it on the computer?

You can't get something out of nothing.

You can stretch it...but it will not very good.

i have no time atm but discussing the option of making it getting a vector-grafic would be worth it imo

btw post the picture you are talking about

This post was edited by Nutribert on Feb 10 2010 02:46am

If the picture comes from a DSLR and is of good quality you can usually stretch it to twice it's initial size without any loss in quality.

In theory you could print it at res 350 current size, then give it to a photo shop to high-res scan it and blow it up.

I just tried interpolating up one of my pictures.
It's taken with a nikon d3000, which is a 10mp dslr.
First of all the picutre is cropped down to less then half (1728x2592 ~4.5mpixels) , and then I interpolated it up to 4724x7087 (~33.5 mpixels)
The result is satisfying.
So yes, you can stretch pictures pretty much if the picture is of good quality to begin with
Editing doesn't perform miracles

That's only assuming he is working with the original RAW or tiff file.

If it has been output to a jpeg @ 800x600. Trying to stretch it to 1920x1200 will result it a drastically lower quality / choppy image.

I would say no. You're way better off just retaking the photo. It sucks, but that's the way it works.