Structured-Light Three-Dimensional Imaging System
The system mainly comprises two cameras and a projection module. First, the camera imaging models and relative poses are calibrated. A multifrequency phase-shifting structured-light coding scheme then projects coded light onto the object's surface while the stereo cameras synchronously capture fringe images. Software decodes the image sequence to obtain surface-modulated phase information. Phase and epipolar constraints match corresponding points between the cameras, and stereo triangulation reconstructs a high-precision three-dimensional point cloud. Main algorithms include camera calibration, multifrequency phase-shifting structured-light encoding and decoding, correspondence matching based on stereo epipolar rectification, and calculation of three-dimensional point coordinates.
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