[Olena] Document segmentation and reconstruction

I can not upload images, and with the examples of the page is to superimpose html and PDF. http://www.lrde.epita.fr/cgi-bin/twiki/view/Olena/PageSnR "terminate called after throwing an instance of 'Magick :: WarningCoder'Ooops! Something went wrong. Please contact us in order to fix that! olena@lrde.epita.fr. Thank you!"