Affiliation:
1. Nanjing University of Science and Technology
Abstract
White light scanning interferometry (WLSI) is a key non-contact
three-dimensional (3D) morphometry method. The traditional envelope
peak detection (EPD) algorithm is a typical WLSI surface recovery
algorithm without phase calculation, but its accuracy is susceptible
to noise and fitting errors. In this paper, we propose an improved EPD
algorithm based on the complete ensemble empirical mode decomposition
with adaptive noise (CEEMDAN) to solve the above problem. The proposed
algorithm can accurately locate the position of the envelope peak. The
simulation and experiment results demonstrate that the proposed method
is effective in improving the accuracy of the measurements.
Funder
National Natural Science Foundation of
China