کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5007832 | 1461699 | 2017 | 7 صفحه PDF | دانلود رایگان |
- Shape measurement uses background-amplitude encoded high-frequency fringe patterns.
- Background-amplitude extraction and geometry constraints determine phase period order.
- Only four projected patterns and captured images needed with single camera-projector.
This paper presents a new fringe projection method for surface-shape measurement that uses background and amplitude encoded high-frequency fringe patterns. The background and amplitude, combined as a codeword, identify the wrapped phase fringe order to partially unwrap the phase to a low frequency. The low-frequency wrapped phase map is then directly used to reconstruct the surface based on geometry constraints without requiring additional images as in other temporal phase-unwrapping methods. Measurements performed on a double-hemisphere, mask, and manikin head, using projected fringe patterns with 48 periods, demonstrated the ability of the method to perform 3D shape measurement with only four projected patterns and captured images, using a single camera and projector.
Journal: Optics and Lasers in Engineering - Volume 94, July 2017, Pages 63-69