AI Article Synopsis
- Spatial resolution in 3D fringe projection profilometry depends on the number and spacing of fringes, but this process is slow, making it tough to measure fast-moving objects.
- The introduced multispectral fringe projection profilometry uses multispectral light and a special camera to quickly capture multiple fringe patterns in one shot, improving measurement efficiency.
- This method not only enhances spatial resolution by addressing issues like illumination offsets and glare but also achieves high-quality 3D profilometry at video frame rates.
Article Abstract
Spatial resolution in three-dimensional fringe projection profilometry is determined in large part by the number and spacing of fringes projected onto an object. Due to the intensity-based nature of fringe projection profilometry, fringe patterns must be generated in succession, which is time-consuming. As a result, the surface features of highly dynamic objects are difficult to measure. Here, we introduce multispectral fringe projection profilometry, a novel method that utilizes multispectral illumination to project a multispectral fringe pattern onto an object combined with a multispectral camera to detect the deformation of the fringe patterns due to the object. The multispectral camera enables the detection of 8 unique monochrome fringe patterns representing 4 distinct directions in a single snapshot. Furthermore, for each direction, the camera detects two π-phase shifted fringe patterns. Each pair of fringe patterns can be differenced to generate a differential fringe pattern that corrects for illumination offsets and mitigates the effects of glare from highly reflective surfaces. The new multispectral method solves many practical problems related to conventional fringe projection profilometry and doubles the effective spatial resolution. The method is suitable for high-quality fast 3D profilometry at video frame rates.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8167094 | PMC |
| http://dx.doi.org/10.1038/s41598-021-88136-4 | DOI Listing |
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