Evaluation of image-based modeling and laser scanning accuracy for emerging automated performance monitoring techniques
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...Table 7 summarizes the major data capturing techniques of laser scanning, photogrammetry and tagging that are relevant in research [19,31,40,43,61,77,151,196] and decisive features for technique...
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...Resulting major research challenges are (1) effort reduction (automation) of capturing, processing, recognizing and ‘as-built’ BIM creation anew [4,31,43,45,62,77], (2) capturing and integrating...
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Cites background from "Evaluation of image-based modeling ..."
...[157] conducted a detailed comparison of image-based point clouds and laser scanning for automated performance monitoring techniques including accuracy and usability for...
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Cites methods from "Evaluation of image-based modeling ..."
...The methods used to determine the geometric properties from captured images or point clouds are essential in displaying an AR [58,59]....
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"Evaluation of image-based modeling ..." refers background or methods in this paper
..., [15], [36]) to start with a good initial image pair and good estimates for camera parameters in the automatically chosen pair....
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...Recent advancements in automated feature detection and matching techniques [13] allow photographs that are even randomly taken to be matched and used for reconstruction purposes [3], [14], [15], and [16]....
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...If its maximum angle is larger than a threshold, then the point is triangulated [15]....
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...Focal length for each image was extracted from the EXIF (Exchangeable Image file format) tags of JPEG images (file type of almost all digital cameras) and was used to initialize the focal length of the new camera and estimate the intrinsic camera matrix [15]....
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...The initial image pair automatically selected was the pair with the lowest percentage of inliers, but with at least 100 matches (as experienced in [15])....
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