José Luis Lerma

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Close-range photogrammetry is based on the acquisition of imagery to make accurate measurements and, eventually, three-dimensional (3D) photo-realistic models. These models are a photogrammetric product per se. They are usually integrated into virtual reality scenarios where additional data such as sound, text or video can be introduced, leading to(More)
The development of this article follows the search for a technique that automates the modelling and dynamics of any natural (dunes, slipping of mountainsides, glaciers…) or artificial (collapsing of buildings…) structure. In this study, the dynamics of the Argualas rock glacier (Pyrenees-Spain) has been investigated since 1991. A peculiarity of rocks(More)
In this paper we present a methodology to derive accurate 3D photo models of a World Heritage site by means of close range photogrammetry. A freestanding monument inside the Petra Archaeological Park in Jordan close to the gate, the Djin Block No. 9, is chosen to determine the benefits of standalone dense image matching techniques to build up photorealistic(More)
The point density is a preeminent parameter on airborne laser scanner surveys. It is not only related to accuracy but costs and savings. The lack of uniformity of the point density across the survey is well-known in the scientific community. This paper analyzes the behaviour of the point density derived by an oscillating mirror laser scanner on different(More)
Documentation of monuments includes not only geometric analysis but also the detection of alterations and pathologies to define proper actions for protection and preservation. Several pathologies can be found on façades such as moisture, detachments, leaks and replacements. Multispectral techniques can help users to detect and determine these phenomena.(More)