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Last updated 21st August 2025

Dr. Yongjia Xu is a Research Follow of Centre for Precision Technologies (CPT) and ERSRC Future Metrology Hub. He is currently carrying out research work in the field of precision metrology based on structured light.

Dr Yongjia Xu has a BEng degree in Control Technology and Instrument awarded in 2011, and a Master’s degree in Instrument Science and Technology awarded in 2014 from Hebei University of Technology. His master’s thesis was received ‘2013/2014 Excellent Master’s Thesis in Hebei Province’. In Oct. 2014, He moved to UK and started PhD research study in Huddersfield where he received his PhD degree on Mechanical Engineering in Jan. 2019. He has been granted the award of ‘2019 Chinese government Award for outstanding Self-financed Students Abroad’ by China Scholarship Council (500 awardees per year).

He is now being involved as key researcher in 2 EPSRC research projects: “The EPSRC Future Advanced Metrology Hub” (EP/P006930/1) and “A Multiscale Digital Twin-Driven Smart Manufacturing System for High Value-Added Products” (EP/T024844/1) with significant contribution to the study and development of surface measurement technologies. He has published 21 papers, among them there are 10 SCI papers as the first author/corresponding author. Yongjia is the member of Optica, the member of SPIE, and peer reviewer for a number of engineering and scientific journals, including Optics Express, Optics Letters, PhotoniX.

Current Projects

• The EPSRC Future Advanced Metrology Hub, EPSRC (EP/P006930/1), 03/2017-02/2024, Core researcher
• A Multiscale Digital Twin-Driven Smart Manufacturing System for High Value-Added Products, EPSRC (EP/T024844/1), 05/2020-04/2025, Core researcher

Previous Projects

• University Research Fund (URF), internal funding of University of Huddersfield 01/2021-12/2021, PI

Representative publication in recent five years

• Xu, F. Gao and X. Jiang (2018). "Performance analysis and evaluation of geometric parameters in stereo deflectometry." Engineering 4(6), 806-815.
• Xu, F. Gao and X. Jiang (2020). "A brief review of the technological advancements of phase measuring deflectometry." PhotoniX 1, 1-10.
• Gao, Y. Xu and X. Jiang (2022). "Near optical coaxial phase measuring deflectometry for measuring structured specular surfaces," Optics Express 30, 17554-17566. (Corresponding author)
• Gao, Y. Xu, and X. Jiang (2022). "Stereo deflectometry based automatic segmentation technique for measuring structured specular surfaces." Optics and Lasers in Engineering 158: 107195. (Corresponding author)
• Xu, F. Gao and X. Jiang (2018). "Enhancement of measurement accuracy of optical stereo deflectometry based on imaging model analysis." Optics and Lasers in Engineering 111: 1-7.
• Xu, F. Gao, Z. Zhang and X. Jiang (2018). "A holistic calibration method with iterative distortion compensation for stereo deflectometry." Optics and Lasers in Engineering 106: 111-118.