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Absolute phase retrieval using phase-coding patterns and universal complementary strategy for 3D profilometry
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AI
DOI：10.1016/j.optlaseng.2026.109956.png)
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Abstract
En 中文
• A universal complementary strategy has been derived in this article. Meanwhile, the universal formula of complementary strategy, which is a point-to-point operation, guarantees algorithm advantage with independence and parallel processing. • With the help of a universal complementary strategy, a high-frequency phase-coding patterns with integer multiple is proposed to avoid the jump errors for fringe projection profilometry (FPP). By splitting staggered fringe order sets from phase-coding patterns and dividing wrapped phase into different segment, the resulting fringe order can align with wrapped phase which guarantees the success of phase unwrapping. • An improved method combining low-frequency phase-coding patterns with only one gray-coded fringe is also used to elevate the accuracy rate of phase unwrapping in complex measurement scenarios.
Keywords:
3D shape measurement
Phase-coding fringe
Jump errors
Complementary fringe order
Phase unwrapping
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