To address the issue that the traditional optimum three-frequency fringe phase unwrapping method requires 12 phase-shifted images to obtain one frame of 3D reconstruction
resulting in low measurement efficiency and inability to adapt to dynamic scene measurement
an improved optimum three-frequency method based on fringe reuse is proposed. By reusing fringe patterns
the proposed method enables obtaining one additional frame of 3D reconstruction for every newly added set of four-step phase-shifted images. Experimental verification shows that while the unimproved method can recover M frames of 3D reconstruction
the proposed method can recover 3M-2 frames without requiring additional fringe images. Furthermore
motion error is compensated
and measurements of a standard ball bar demonstrate that the RMSE for Ball A radius measurement is 0.0259 mm
and the RMSE for Ball B radius measurement is 0.0242 mm.
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references
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