| Close range photogrammetry measures
objects directly from photographs or digital images captured with a camera
at close range. Digital cameras, visualization and automated image
measuring software, and desktop computing power, have made close range photogrammetry a useful, practical tool for construction. |
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| Multiple, overlapping images taken from different perspectives produce accurate as-built measurements and 3D models. This figure shows positions of three cameras, indicated by grey rectangles photographing a building from multiple positions. |