[ptx] aligning old and new photos with hugin

[Bruno Postle]

I found a book of old and new photos of Sheffield taken from (not
quite) the same location.

They were really badly aligned, so I thought I'd see if I could do
any better with hugin:

  http://bugbear.blackfish.org.uk/~bruno/photos/ranmoor/

(uses javascript mouseover trickery)

Next I need to get hold of some higher resolution originals and take
photos myself to try and get a better alignment.

This technique has lots of possibilities, it is even possible to
determine the precise lens characteristics of a camera that hasn't
taken a photo in a hundred years.

-- 
Bruno