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Second Iteration of Photogrammetric Processing to Refine Image Orientation with Improved Tie-Points
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Second Iteration of Photogrammetric Processing to Refine Image Orientation with Improved Tie-Points
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Journal Article
Second Iteration of Photogrammetric Processing to Refine Image Orientation with Improved Tie-Points
2018
Overview
Photogrammetric processing is available in various software solutions and can easily deliver 3D pointclouds as accurate as 1 pixel. Certain applications, e.g., very accurate shape reconstruction in industrial metrology or change detection for deformation studies in geosciences, require results of enhanced accuracy. The tie-point extraction step is the opening in the photogrammetric processing chain and therefore plays a key role in the quality of the subsequent image orientation, camera calibration and 3D reconstruction. Improving its precision will have an impact on the obtained 3D. In this research work we describe a method which aims at enhancing the accuracy of image orientation by adding a second iteration photogrammetric processing. The result from the classical processing is used as a priori information to guide the extraction of refined tie-points of better photogrammetric quality. Evaluated on indoor and UAV acquisitions, the proposed methodology shows a significant improvement on the obtained 3D point accuracy.
Publisher
MDPI AG,MDPI
