{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T00:55:06Z","timestamp":1790384106376,"version":"4.1.0"},"reference-count":35,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2019,12,19]],"date-time":"2019-12-19T00:00:00Z","timestamp":1576713600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Unmanned aerial vehicles (UAV) are increasingly used for topographic mapping. The camera calibration for UAV image blocks can be performed a priori or during the bundle block adjustment (self-calibration). For an area of interest with flat scene and corridor configuration, the focal length of camera is highly correlated with the height of the camera. Furthermore, systematic errors of camera calibration accumulate on the longer dimension and cause deformation. Therefore, special precautions must be taken when estimating camera calibration parameters. In order to better investigate the impact of camera calibration errors, a synthetic, error-free aerial image block is generated to simulate several issues of interest. Firstly, the erroneous focal length in the case of camera pre-calibration is studied. Nadir images are not able to prevent camera poses from drifting to compensate for the erroneous focal length, whereas the inclusion of oblique images brings significant improvement. Secondly, the case where the focal length varies gradually (e.g., when the camera subject to temperature changes) is investigated. The neglect of this phenomenon can substantially degrade the 3D measurement accuracy. Different flight configurations and flight orders are analyzed, the combination of oblique and nadir images shows better performance. At last, the rolling shutter effect is investigated. The influence of camera rotational motion on the final accuracy is negligible compared to that of the translational motion. The acquisition configurations investigated are not able to mitigate the degradation introduced by the rolling shutter effect. Other solutions such as correcting image measurements or including camera motion parameters in the bundle block adjustment should be exploited.<\/jats:p>","DOI":"10.3390\/rs12010022","type":"journal-article","created":{"date-parts":[[2019,12,23]],"date-time":"2019-12-23T03:15:01Z","timestamp":1577070901000},"page":"22","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":40,"title":["Simulation and Analysis of Photogrammetric UAV Image Blocks\u2014Influence of Camera Calibration Error"],"prefix":"10.3390","volume":"12","author":[{"given":"Yilin","family":"Zhou","sequence":"first","affiliation":[{"name":"LaSTIG, IGN, ENSG, University Paris-Est, F-94160 Saint-Mande, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ewelina","family":"Rupnik","sequence":"additional","affiliation":[{"name":"LaSTIG, IGN, ENSG, University Paris-Est, F-94160 Saint-Mande, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christophe","family":"Meynard","sequence":"additional","affiliation":[{"name":"LaSTIG, IGN, ENSG, University Paris-Est, F-94160 Saint-Mande, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0653-9213","authenticated-orcid":false,"given":"Christian","family":"Thom","sequence":"additional","affiliation":[{"name":"LaSTIG, IGN, ENSG, University Paris-Est, F-94160 Saint-Mande, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marc","family":"Pierrot-Deseilligny","sequence":"additional","affiliation":[{"name":"LaSTIG, IGN, ENSG, University Paris-Est, F-94160 Saint-Mande, France"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2019,12,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1007\/s12518-013-0120-x","article-title":"UAV for 3D mapping applications: A review","volume":"6","author":"Nex","year":"2014","journal-title":"Appl. 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