{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T05:08:35Z","timestamp":1780463315901,"version":"3.54.1"},"reference-count":20,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2022,4,3]],"date-time":"2022-04-03T00:00:00Z","timestamp":1648944000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003725","name":"National Research Foundation of Korea","doi-asserted-by":"publisher","award":["NRF-2021R1A5A1032433"],"award-info":[{"award-number":["NRF-2021R1A5A1032433"]}],"id":[{"id":"10.13039\/501100003725","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003725","name":"National Research Foundation of Korea","doi-asserted-by":"publisher","award":["NRF-2020R1A2C3005687"],"award-info":[{"award-number":["NRF-2020R1A2C3005687"]}],"id":[{"id":"10.13039\/501100003725","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The development of unmanned aerial vehicles (UAVs) is expected to become one of the most commercialized research areas in the world over the next decade. Globally, unmanned aircraft have been increasingly used for safety surveillance in the construction industry and civil engineering fields. This paper presents an aerial image-based approach using UAVs to inspect cracks and deformations in buildings. A state-of-the-art safety evaluation method termed SMART SKY EYE (Smart building safety assessment system using UAV) is introduced; this system utilizes an unmanned airplane equipped with a thermal camera and programmed with various surveying efficiency improvement methods, such as thermography, machine-learning algorithms, and 3D point cloud modeling. Using this method, crack maps, crack depths, and the deformations of structures can be obtained. Error rates are compared between the proposed and conventional methods.<\/jats:p>","DOI":"10.3390\/s22072762","type":"journal-article","created":{"date-parts":[[2022,4,3]],"date-time":"2022-04-03T06:04:01Z","timestamp":1648965841000},"page":"2762","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["SMART SKY EYE System for Preliminary Structural Safety Assessment of Buildings Using Unmanned Aerial Vehicles"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8940-5255","authenticated-orcid":false,"given":"Jaehoon","family":"Bae","sequence":"first","affiliation":[{"name":"Department of Architectural Design, College of Engineering Science, Chonnam National University, Gwangju  59626, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jonghoon","family":"Lee","sequence":"additional","affiliation":[{"name":"Joong Ang ENR Co., Ltd., Seoul 05645, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arum","family":"Jang","sequence":"additional","affiliation":[{"name":"School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 02841, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Young K.","family":"Ju","sequence":"additional","affiliation":[{"name":"School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 02841, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5903-2152","authenticated-orcid":false,"given":"Min Jae","family":"Park","sequence":"additional","affiliation":[{"name":"School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 02841, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,4,3]]},"reference":[{"key":"ref_1","unstructured":"(2022, March 14). Tealgroup. Available online: https:\/\/www.tealgroup.com\/index.php\/pages\/press-releases\/60-teal-group-predicts-worldwide-civil-drone-production-will-almost-triple-over-the-next-decade."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.autcon.2014.01.004","article-title":"Mobile 3D mapping for surveying earthwork projects using Unmanned Aerial Vehicle (UAV) system","volume":"41","author":"Siebert","year":"2014","journal-title":"Autom. Constr."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"458","DOI":"10.1016\/j.autcon.2018.06.015","article-title":"Feasibility study for drone-based masonry construction of real-scale structures","volume":"94","author":"Goessens","year":"2018","journal-title":"Autom. Constr."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Hallermann, N., and Morgenthal, G. (2013, January 24\u201327). Unmanned aerial vehicles (UAV) for the assessment of existing structures. Proceedings of the 36th IABSE Symposium, Kolkata, India.","DOI":"10.2749\/222137813808627172"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"124","DOI":"10.1080\/15732479.2017.1330891","article-title":"Unmanned aerial vehicle inspection of the Placer River Trail Bridge through image-based 3D modelling","volume":"14","author":"Khaloo","year":"2018","journal-title":"Struct. Infrastruct. Eng."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"7189","DOI":"10.1080\/01431161.2018.1515510","article-title":"Facility inspection using UAVs: A case study in the University of Georgia campus","volume":"39","author":"Moore","year":"2018","journal-title":"Int. J. Remote Sens."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Lee, J., Bae, J., and Ju, Y.K. (2019, January 4\u20136). Preliminary safety evaluation technology of buildings using Unmanned Aerial Vehicle (UAV). Proceedings of the 2019 IABSE Congress, New York, NY, USA.","DOI":"10.2749\/newyork.2019.2471"},{"key":"ref_8","first-page":"15","article-title":"Analysis of various decision tree algorithms for classification in data mining","volume":"163","author":"Gupta","year":"2017","journal-title":"Int. J. Comput. Appl."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"5","DOI":"10.1023\/A:1010933404324","article-title":"Random forest","volume":"45","author":"Breiman","year":"2001","journal-title":"Mach. Learn."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Schapire, R.E. (2013). Explaining adaboost. Empirical Inference, Springer.","DOI":"10.1007\/978-3-642-41136-6_5"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Ren, J., Lee, S.D., Chen, X., Kao, B., Cheng, R., and Cheung, D. (2009, January 6\u20139). Na\u00efve bayes classification of uncertain data. Proceedings of the 9th IEEE International Conference on Data Mining, Miami, FL, USA.","DOI":"10.1109\/ICDM.2009.90"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"730","DOI":"10.1016\/j.neucom.2005.12.010","article-title":"Support vector machine for functional data classification","volume":"69","author":"Rossi","year":"2006","journal-title":"Neurocomputing"},{"key":"ref_13","unstructured":"Raschka, S. (2019). Python Machine Learning, Packt Publishing Ltd.. [3rd ed.]."},{"key":"ref_14","first-page":"128","article-title":"Image-based crack detection for real concrete surfaces","volume":"3","author":"Yamaguchi","year":"2008","journal-title":"Inst. Electr. Eng. Jpn."},{"key":"ref_15","unstructured":"Henriques, M.J., and Roque, D. (2015, January 21\u201324). Unmanned aerial vehicles (UAV) as a support to visual inspections of concrete dam. Proceedings of the Second International Dam World Conference, Lisbon, Portugal."},{"key":"ref_16","first-page":"11","article-title":"Photogrammetric crack detection method in building using unmanned aerial vehicle","volume":"35","author":"Jeong","year":"2019","journal-title":"J. Archi. Inst. Korea. Structu. Constr."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"7287","DOI":"10.1109\/TIE.2015.2475235","article-title":"Innovative automated control system for PV fields inspection and remote control","volume":"62","author":"Aghaei","year":"2015","journal-title":"IEEE Trans. Ind. Electron."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"252","DOI":"10.1016\/j.autcon.2018.05.002","article-title":"Review of unmanned aerial system (UAS) applications in the built environment: Towards automated building inspection procedures using drones","volume":"93","author":"Rakha","year":"2018","journal-title":"Automat. Constr."},{"key":"ref_19","first-page":"3","article-title":"Rapid structural safety evaluation method of buildings using unmanned aerial vehicle (SMART SKY EYE)","volume":"35","author":"Jeong","year":"2019","journal-title":"J. Archit. Inst. Korea Struct. Constr."},{"key":"ref_20","unstructured":"Lee, J.H., Jeong, D.M., Batbayar, E., and Ju, Y.K. (2019, January 26\u201327). UAV & thermography module-based building crack detecting system. Proceedings of the General Assembly, Spring Annual Conference of AIK, Seoul, Korea."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/7\/2762\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T22:49:22Z","timestamp":1760136562000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/7\/2762"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,4,3]]},"references-count":20,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2022,4]]}},"alternative-id":["s22072762"],"URL":"https:\/\/doi.org\/10.3390\/s22072762","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,4,3]]}}}