{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,18]],"date-time":"2025-11-18T12:27:41Z","timestamp":1763468861343,"version":"build-2065373602"},"reference-count":34,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2023,7,17]],"date-time":"2023-07-17T00:00:00Z","timestamp":1689552000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003787","name":"Natural Science Foundation of Hebei Province","doi-asserted-by":"publisher","award":["E2022208020","CXZZS2022080","22311701D"],"award-info":[{"award-number":["E2022208020","CXZZS2022080","22311701D"]}],"id":[{"id":"10.13039\/501100003787","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003482","name":"Hebei Provincial Department of Education","doi-asserted-by":"publisher","award":["E2022208020","CXZZS2022080","22311701D"],"award-info":[{"award-number":["E2022208020","CXZZS2022080","22311701D"]}],"id":[{"id":"10.13039\/501100003482","id-type":"DOI","asserted-by":"publisher"}]},{"name":"S&amp;T Program of Hebei","award":["E2022208020","CXZZS2022080","22311701D"],"award-info":[{"award-number":["E2022208020","CXZZS2022080","22311701D"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Due to the advantages of simple construction, easy application and good environmental suitability, handheld structured-light measurement systems have broad application prospects in 3D measurements. Here, a monocular-vision-guided line-structured-light measurement system is developed, and the posture of the handheld device can be obtained via a specifically designed target attached to it. No more marker points need to be adhered onto the object under inspection. The key for the system calibration is to obtain the coordinate transformation matrix from the sensor to the featured target coordinate system. The mathematical model of the system is first established. Then, an improved multi-view calibration method is proposed, where a selection process for the image pairs is conducted for accuracy improvement. With this method, the maximum relative error of the measured stair heights can be reduced from 0.48% to 0.16%. The measurement results for the specific parts further verified the effectiveness of the proposed system and the calibration method.<\/jats:p>","DOI":"10.3390\/s23146469","type":"journal-article","created":{"date-parts":[[2023,7,18]],"date-time":"2023-07-18T01:46:02Z","timestamp":1689644762000},"page":"6469","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["High-Precision Calibration of a Monocular-Vision-Guided Handheld Line-Structured-Light Measurement System"],"prefix":"10.3390","volume":"23","author":[{"given":"Jingbo","family":"Zhou","sequence":"first","affiliation":[{"name":"School of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhaohui","family":"Ji","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuehua","family":"Li","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaohong","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wenhao","family":"Yao","sequence":"additional","affiliation":[{"name":"Tangshan Yinglai Technology Co., Ltd., Tangshan 063000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yafang","family":"Qin","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"580417","DOI":"10.1155\/2013\/580417","article-title":"A Sphere-Based Calibration Method for Line Structured Light Vision Sensor","volume":"5","author":"Wei","year":"2013","journal-title":"Adv. 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