Study of weighted fusion methods for the measurement of surface geometry

Jian Wang, Luca Pagani, Richard K. Leach, Wenhan Zeng, Bianca M. Colosimo, Liping Zhou

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


Four types of weighted fusion methods, including pixel-level, least-squares, parametrical and non-parametrical, have been classified and theoretically analysed in this study. In particular, the uncertainty propagation of the weighted least-squares fusion was analysed and its relation to the Kalman filter was studied. In cooperation with different fitting models, these four weighted fusion methods can be applied to a range of measurement challenges. The experimental results of this study show that the four weighted fusion methods compose a computationally efficient and reliable system for multi-sensor measurement problems, especially for freeform surface measurement. A comparison of weighted fusion with residual approximation-based fusion has also been conducted by providing the input datasets with different noise levels and sample sizes. The results demonstrated that weighted fusion and residual approximation-based fusion are complementary approaches applicable to most fusion scenarios.

Original languageEnglish
Pages (from-to)111-121
Number of pages11
JournalPrecision Engineering
Early online date29 Jul 2016
Publication statusPublished - Jan 2017


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