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Express"],"published-print":{"date-parts":[[2026,6,1]]},"abstract":"<jats:p>While the manufacturing industry demands high-precision and efficient measurement of high-reflective workpieces, the low dynamic range of images depicting such workpieces leads to the loss of fringe information. Thus, achieving accurate measurement becomes challenging. Existing three-dimensional (3D) measurement methods have inherent limitations, such as being time-consuming, exhibiting poor precision, and poor dynamics. This paper proposes a double-exposure branch fusion network (DBF-Net) for high-dynamic-range (HDR) fringe projection profilometry. First, based on the pinhole imaging principle, the 3D measurement of fringe projections and the camera-projector inverse calibration model was explored to establish the object-image relationship accurately. Then, images of two exposure levels were randomly selected as the input for DBF-Net, and a sinusoidality-preserving algorithm was embedded into the network to obtain HDR fringe images. A weighted fusion loss function was also designed, which allows for dynamically adjusting the weighting of each term to improve the generalization of the method. By combining the aforementioned components with a phase-demodulation method, high-precision 3D reconstruction for high-reflectivity workpieces was achieved. The fringe projection profilometry system was established, and 3D accuracy verification experiments were conducted. And comparative experiments focusing on three aspects were conducted: image quality, phase demodulation accuracy, and 3D reconstruction of high-reflectivity workpieces. Based on the results, the proposed method achieves a measurement accuracy of 0.06\u2005mm, effectively resolving the point-cloud loss issue encountered when measuring high-reflectivity surfaces.<\/jats:p>","DOI":"10.1364\/oe.589653","type":"journal-article","created":{"date-parts":[[2026,4,14]],"date-time":"2026-04-14T21:00:09Z","timestamp":1776200409000},"page":"20318","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["High-dynamic-range fringe projection profilometry using a double-exposure branch fusion network"],"prefix":"10.1364","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5508-8594","authenticated-orcid":true,"given":"Xiao","family":"Li","sequence":"first","affiliation":[{"name":"China University of Petroleum East China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xingpei","family":"Chen","sequence":"additional","affiliation":[{"name":"China University of Petroleum East China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0567-1826","authenticated-orcid":true,"given":"Wei","family":"Li","sequence":"additional","affiliation":[{"name":"China University of Petroleum East China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhuo","family":"Cheng","sequence":"additional","affiliation":[{"name":"China University of Petroleum East China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianlei","family":"Liu","sequence":"additional","affiliation":[{"name":"China University of Petroleum East China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaokang","family":"Yin","sequence":"additional","affiliation":[{"name":"China University of Petroleum East China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xin\u2019an","family":"Yuan","sequence":"additional","affiliation":[{"name":"China University of Petroleum East China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Longyang","family":"Wang","sequence":"additional","affiliation":[{"name":"China University of Petroleum East China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xin","family":"Ma","sequence":"additional","affiliation":[{"name":"Southern University of Science and Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,5,26]]},"reference":[{"key":"oe-34-11-20318-R1","doi-asserted-by":"publisher","first-page":"8","DOI":"10.1016\/j.optlaseng.2017.03.008","type":"journal-article","volume":"95","author":"Song","year":"2017","journal-title":"Optics and Lasers in Engineering"},{"key":"oe-34-11-20318-R2","doi-asserted-by":"publisher","first-page":"56","DOI":"10.1016\/j.optlaseng.2014.03.003","type":"journal-article","volume":"59","author":"Feng","year":"2014","journal-title":"Optics and Lasers in Engineering"},{"key":"oe-34-11-20318-R3","doi-asserted-by":"publisher","first-page":"92","DOI":"10.1117\/12.2511918","type":"journal-article","volume":"11053","author":"Cui","year":"2018","journal-title":"Proc. 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