Given you have two photos, one taken from your left eye (left.jpg) and one from your right eye (right.jpg), this is what you are going to do with imagemagick (available in Extras): Code: convert left.jpg -rotate 270 -geometry 270x480 left2.jpg convert right.jpg -rotate 270 -geometry 270x480 right2.jpg montage right2.jpg left2.jpg -geometry +0+0 both.jpg Then cross your eyes upon both.jpg Maybe there are other options to make it even shorter. Now somebody make a nice QT program to choose the two photos and apply the conversion automatically!
convert left.jpg -rotate 270 -geometry 270x480 left2.jpg convert right.jpg -rotate 270 -geometry 270x480 right2.jpg montage right2.jpg left2.jpg -geometry +0+0 both.jpg