This technology is a line-structured light pattern decoding method that reconstructs 3D coordinates by projecting line-stripe light onto an object, extracting the phase and amplitude for each camera spatial coordinate from the captured images, and applying the phase derived from a Discrete Fourier Transform to triangulation.
Line-structured light methods, such as laser stripe scanning, have traditionally relied on spatially detecting the peak value of stripes in each frame. However, when complex object shapes or specific device configurations cause ambiguity—such as multiple peaks appearing in a single row or column—existing methods based on a single-peak assumption struggle to provide accurate detection.
By applying temporal Fourier analysis to each pixel, this technology determines the correspondence between the camera and projector as a phase, resolving stripe ambiguity through pixel-level computation without complex 2D image processing. It achieves sub-pixel precision by using only pixels with an amplitude above a certain threshold and incorporating multi-frequency phase unwrapping. Applicable to industrial 3D inspection equipment, reverse engineering scanners, and quality measurement systems, it enables precise measurement of parts with complex curves without false detections.
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