ABSTRACT: Tridimensional reconstruction of areas and objects of interest from images acquired from aerial drones plays a key role in numerous fields, from the less critical, like urban planning and archeological area survey, to the most critical, like natural disaster monitoring, and search & rescue. Many techniques proposed to deal with this issue require expensive instrumentation or use computationally costly algorithm or need some a priori information that are not always available. Thus, they are not suitable for certain applications or in some specific situations. In order to overcome these limitations, we designed a technique that allows automatically creating 3D models in real-time using only a couple of images of the scene one is interested in, acquired with a cheap compact camera mounted on the drone, without the needing for any additional information. The proposed technique outputs dense true-color 3D models, which give the impression to the user to be physically present within the scene. Tested for monitoring the progress of the works in a construction site, the technique has been capable to create realistic and easy-to-interpret 3D models of areas and objects in less than 1 second and with a sufficient accuracy to permit large-scale surveys.