Image correction help

[nilodor]

So I'm trying to overlay a photo that is distorted with a fisheye lens (actual photo from a high speed camera), with a photo that isn't distorted (computer generated). I would prefer to turn the computer generated photo into a fisheye photo. The opposite is also possible but not quite as good an option because I would prefer to not modify reality.

The processing is for my research, so we could probably afford a cheap program <50 dollars but nothing too extravagant, and free is always the best. Ideas?

[cartman]

You might want to check out Photoshop Express:

https://www.photoshop.com/express/landing.html

or Gimp, if you want something locally installed:

http://www.gimp.org/