{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T01:42:39Z","timestamp":1760060559297,"version":"build-2065373602"},"reference-count":33,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2025,9,8]],"date-time":"2025-09-08T00:00:00Z","timestamp":1757289600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Jiangxi Provincial Department of Education Science and Technology Research Project","award":["GJJ213110","YZYB-24-19","62361041","20242BAB25053"],"award-info":[{"award-number":["GJJ213110","YZYB-24-19","62361041","20242BAB25053"]}]},{"name":"Yuzhang Normal University of Science and Technology Research Project","award":["GJJ213110","YZYB-24-19","62361041","20242BAB25053"],"award-info":[{"award-number":["GJJ213110","YZYB-24-19","62361041","20242BAB25053"]}]},{"name":"National Natural Science Foundation of China","award":["GJJ213110","YZYB-24-19","62361041","20242BAB25053"],"award-info":[{"award-number":["GJJ213110","YZYB-24-19","62361041","20242BAB25053"]}]},{"name":"Natural Science Foundation of Jiangxi Province","award":["GJJ213110","YZYB-24-19","62361041","20242BAB25053"],"award-info":[{"award-number":["GJJ213110","YZYB-24-19","62361041","20242BAB25053"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>The concept of symmetry is a fundamental principle in various scientific and engineering fields, including welding technology. In the context of this paper, symmetry could play a role in optimizing the welding trajectory. Welding trajectory point detection relies on machine vision perception and intelligent algorithms to extract welding trajectory, which is crucial for the automatic welding of steel parts. However, in practice, sieve-net welding still relies on manual or semi-automatic operations, which have limitations, such as fixed positions and sizes, making it unsafe and inefficient. This paper proposes a 2D skeleton extraction algorithm for detecting weld joints in a sieve-net point cloud. First, the algorithm applies principal component analysis (PCA) to transform the point cloud and projects it into a 2D image with minimal information loss. Second, the expansion corrosion method is then employed to enhance the connectivity and refinement of the sieve-net mesh to serve the extraction of 2D skeleton. Third, the algorithm extracts the skeleton of the sieve-net grid and detects solder points. The average detection accuracy of the proposed algorithm is over 95%, which confirms its feasibility and practical application value in sieve-net welding.<\/jats:p>","DOI":"10.3390\/sym17091484","type":"journal-article","created":{"date-parts":[[2025,9,8]],"date-time":"2025-09-08T11:51:12Z","timestamp":1757332272000},"page":"1484","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Two-Dimensional Skeleton Intersection Extraction-Based Method for Detecting Welded Joints on the Three-Dimensional Point Cloud of Sieve Nets"],"prefix":"10.3390","volume":"17","author":[{"given":"Haiping","family":"Zhong","sequence":"first","affiliation":[{"name":"School of Mathematics and Computer, Yuzhang Normal University, Nanchang 330103, China"}]},{"given":"Weigang","family":"Jian","sequence":"additional","affiliation":[{"name":"School of Mathematics and Computer, Yuzhang Normal University, Nanchang 330103, China"}]},{"given":"Yuchen","family":"Yang","sequence":"additional","affiliation":[{"name":"School of Software, Nanchang University, Nanchang 330047, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9404-2521","authenticated-orcid":false,"given":"Wei","family":"Li","sequence":"additional","affiliation":[{"name":"School of Mathematics and Computer, Yuzhang Normal University, Nanchang 330103, China"}]},{"given":"Liyuan","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Mathematics and Computer, Yuzhang Normal University, Nanchang 330103, China"}]}],"member":"1968","published-online":{"date-parts":[[2025,9,8]]},"reference":[{"key":"ref_1","first-page":"17","article-title":"Production and Development of Stainless Steel Microwires and Sieves","volume":"27","author":"Wu","year":"2001","journal-title":"Steel Wire Prod."},{"key":"ref_2","unstructured":"Guo, X., and Lin, F. 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