Abstract
We present an approach for single-frame three-dimensional (3-D) imaging using multiwavelength array projection and a stereo vision setup of two multispectral snapshot cameras. Thus a sequence of aperiodic fringe patterns at different wavelengths can be projected and detected simultaneously. For the 3-D reconstruction, a computational procedure for pattern extraction from multispectral images, denoising of multispectral image data, and stereo matching is developed. In addition, a proof-of-concept is provided with experimental measurement results, showing the validity and potential of the proposed approach.
Highlights
High-speed 3-D imaging matches the increasing demands for real-time capability in nondestructive industrial inspection, human–machine interaction, biomedical and security applications, etc
The previous 3-D techniques based on single-frame pattern projection could be classified into two groups according to the pattern type: monochromatic patterns with phase modulation in the frequency domain[6,7,8] and composite RGB fringe patterns, in which the phase shift is coded with RGB colors.[9,10,11]
The decoding of monochromatic patterns will confront a lot of artifacts at objects with shape discontinuities or very sharp edges, and a hard challenge at the RGB fringe projection is that the phase map unwrapping becomes difficult without additional patterns
Summary
High-speed 3-D imaging matches the increasing demands for real-time capability in nondestructive industrial inspection, human–machine interaction, biomedical and security applications, etc. The previous 3-D techniques based on single-frame pattern projection could be classified into two groups according to the pattern type: monochromatic patterns with phase modulation in the frequency domain[6,7,8] and composite RGB fringe patterns, in which the phase shift is coded with RGB colors.[9,10,11] the decoding of monochromatic patterns will confront a lot of artifacts at objects with shape discontinuities or very sharp edges, and a hard challenge at the RGB fringe projection is that the phase map unwrapping becomes difficult without additional patterns (e.g., gray codes) These techniques are affected from nonuniform surface properties and are limited by their application occasions. We present a proof-of-concept with the first experimental results
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