Abstract
Close-range photogrammetry is a widely used technique to acquire dimensional data of buildings. The indirect measurement of buildings under construction from images avoids the use of tedious and risky direct procedures. In this paper, we present the extension of a 2D low-cost measurement system previously developed to a 3D measurement of buildings under construction. This system consists of a digital, off-the-shelf camera and a laser distance meter which is mounted on an in-house support that permits independent orientation of the distance meter. Combining the image, the distance and the support orientation from different points of view, we can obtain a scaled 3D model that permits us to make an inventory of a building under construction with a relative error below 0.7 percent.
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