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To obtain an accurate image edge and improve image processing accuracy, a novel subpixel edge detection method is proposed in this study. The precontour is segmented by binarization, the second derivative in the neighborhood of the demand point is calculated, and the obtained value is sampled according to the specified rules for curve fitting. The point whose curve ordinate is 0 is the subpixel position. The experiment proves that an improved subpixel edge can be obtained. Results show that the proposed method can extract a satisfactory subpixel contour, which is more accurate and reliable than the edge results obtained by several current pixel\u2010level operators, such as the Canny operator, and can be used in edge detection with high\u2010accuracy requirements, such as the contour detection of online tools.<\/jats:p>","DOI":"10.1155\/2021\/7270908","type":"journal-article","created":{"date-parts":[[2021,9,4]],"date-time":"2021-09-04T03:35:05Z","timestamp":1630726505000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Research on Subpixel Algorithm of Fixed\u2010Point Tool Path Measurement"],"prefix":"10.1155","volume":"2021","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3727-8703","authenticated-orcid":false,"given":"Xi","family":"Zhang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5247-3091","authenticated-orcid":false,"given":"Zixie","family":"Guo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5325-5897","authenticated-orcid":false,"given":"Xiangwei","family":"Liu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8061-3277","authenticated-orcid":false,"given":"Longjia","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,9,3]]},"reference":[{"key":"e_1_2_8_1_2","doi-asserted-by":"publisher","DOI":"10.3788\/irla201746.1017010"},{"key":"e_1_2_8_2_2","first-page":"1692","article-title":"Research on spot location algorithm of triangular ranging LiD-AR","volume":"29","author":"Gao L.","year":"2016","journal-title":"Chinese Journal of Sensors and Actuators"},{"key":"e_1_2_8_3_2","doi-asserted-by":"publisher","DOI":"10.1155\/2018\/3238140"},{"key":"e_1_2_8_4_2","doi-asserted-by":"publisher","DOI":"10.1155\/2016\/5328130"},{"key":"e_1_2_8_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.procs.2018.04.209"},{"key":"e_1_2_8_6_2","first-page":"103","article-title":"Marine ship image edge detection based on improved Scharr algor-ithm","volume":"39","author":"Li H.","year":"2019","journal-title":"Ship Electronic Engineering"},{"key":"e_1_2_8_7_2","first-page":"114","article-title":"Image fusion algorithm based on laplacian operator with wavelet Transform","volume":"40","author":"Xie H.","year":"2016","journal-title":"Information Technology"},{"key":"e_1_2_8_8_2","first-page":"12","article-title":"Study on the image edge extracting algorithm for machine vision measuring system","author":"Duan Z.","year":"2017","journal-title":"Modular Machine Tool & Automatic Manufacturing Technique"},{"key":"e_1_2_8_9_2","first-page":"1697","article-title":"Edge extraction algorithm based on quantum flexible representation","volume":"39","author":"Zhang S.","year":"2018","journal-title":"Computer Engineering and Design"},{"key":"e_1_2_8_10_2","first-page":"116","article-title":"An algorithm for optimized edge detection based on image mask and Hit-misss transform","volume":"34","author":"Chen K.","year":"2018","journal-title":"Journal of Xi\u2019an University of Technology"},{"key":"e_1_2_8_11_2","first-page":"243","article-title":"Sub-pixel edge detection algorithm based on nonlinear fourth-order image interpolation","volume":"2","author":"Wu P.","year":"2016","journal-title":"Journal of Harbin Engineering University"},{"key":"e_1_2_8_12_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.imavis.2010.05.003"},{"key":"e_1_2_8_13_2","first-page":"1468","article-title":"Non-contact measurement of external thread based on improved zernike moment sub-pixel edge extraction algorithm","volume":"48","author":"Cai Y.","year":"2014","journal-title":"Journal of Shanghai Jiaotong University"},{"key":"e_1_2_8_14_2","first-page":"148","article-title":"Edge detection of small module gear sub-pixel image based on neighborhood characteristic analysis","volume":"3","author":"Zhu W.","year":"2018","journal-title":"Chinese Journal of Scientific Instrument"},{"key":"e_1_2_8_15_2","doi-asserted-by":"crossref","unstructured":"FabijanskaA. 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