Todo LibreSoftware : Mosaicking plug'in for the GIMP (and stand alone) also known as Panorama.
It does homographic transformation from a few reference points
image by http://www.ifrance.com/ivanoff7/
hugin http://jmtrivial.info/blog/index.php?2006/05/10/23-clermont-ferrand-vu-du-puy-de-chanturgue
I have some old C code that work on greyscale pictures. Contact me if interessed to start w/ me a such Project,
Some Software : http://www.path.unimelb.edu.au/~dersch/
Photomosaic : http://mazaika.tripod.com/maztutor/mosaictest.html
http://www.cs.ubc.ca/spider/ladic/softunix.html
http://isis.astrogeology.usgs.gov/
http://iul.eng.fiu.edu/Research/Registration/ImageRegistrationPage.htm
Support irc://irc.freenode.net/gimp
Analysis http://mrl.nyu.edu/projects/image-analogies/lf/
http://www.logarithmic.net/pfh/resynthesizer/more
fonts : http://plagiats.free.fr/nathgpl/ http://titaniclinux.net/mirrors/fonts/
http://www.greyc.ensicaen.fr/~dtschump/greycstoration/demonstration.html