A three-dimensional reconstruction method and device based on a monocularthree-dimensional scanning system is provided. The monocular three-dimensionalscanning system includes an invisible structured light scanning component, acameraand projecting equipment. The method includes: a depth map of a measuredobjectis collected by using the invisible structured light scanning component, andthe depthmap is converted into a three-dimensional data point set, and the three-dimensionaldata point set includes a plurality of three-dimensional points; a targetlight planeequation corresponding to a target three-dimensional point is determined intheplurality of three-dimensional points; the target three-dimensional point isprojectedonto a modulated multi-line stripe image, and a target stripe corresponding tothe targetlight plane equation is determined in the modulated multi-line stripe image;and athree-dimensional point reconstructed by the target stripe in a cameracoordinate system isobtained according to the target light plane equation and center coordinatesof thetarget stripe. The present invention solves the technical problem of occlusionduringthree-dimensional reconstruction by using binocular stereo vision.
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