did you notice that the guys in the video do not show _how_ the 3d environment was made from the photos, they just give a nice presentation of assembled pictures. they probably spent hours on adjusting and calibrating the images. the automatic recognition of the marker points in the images will never be fully automatic - especially not if you consider all the low quality pictures of amateur photographs. probably there will be the user doing endless clicking as in those 3d reconstruction tools like imodeller (see http://www.imodeller.com/ ) and image modeler ( see http://www.realviz.fr/ ). btw. you need a lot of pictures and a lot of well picked (error less than a pixel) feature points to robustly estimate the camera geometries...