Scanning system and method for three-dimensional images

Abstract

The invention relates to a scanning system and a method for three-dimensional images, wherein the system comprises a pick-up device, a rotating device, mutually orthogonal panels and a light source; and the method comprises: 1. transversely arranging the mutually orthogonal panels; 2. calibrating the CCD camera according to a second marking point on the mutually orthogonal panels to obtain the internal and external parameters of the CCD camera; 3. obtaining the plane equation of a linear laser scanning surface according to the internal and external parameters of the CCD camera, the linear laser emitted from the light source and the images of the mutually orthogonal panels; and 4. determining the three-dimensional coordinates of the surface points of the tested objects according to the plane equation of the linear laser scanning surface and the equation of straight line of the linear laser images. The invention reduces the cost, overcomes the limits to the surface matching of the scanning curve sheets based on a triangle relation in the prior art, and improves the efficiency, precision and flexibility of the scanning by arranging a rotating table and transversely arranging mutually orthogonal panels.

Description

【Technical field】 [0001] The invention relates to three-dimensional scanning technology, in particular to a three-dimensional image scanning system and a three-dimensional image scanning method. 【Background technique】 [0002] Non-contact optical scanning mainly includes active scanning and passive scanning. Among them, the active scanning methods based on trigonometry mainly include laser scanning and raster scanning methods. Images are formed on a CCD camera. When the surface position of the object changes, the displacement of the image formed by the CCD camera on the detector also changes. see figure 1 Schematic diagram of three-dimensional scanning based on trigonometry in the prior art, such as figure 1 As shown in the figure, the positions of the light source and the CCD camera have been calibrated in advance; the direct triangular relationship between the object, the light source and the CCD camera is used to calculate the distance of the object. Passive scanning...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the high cost caused by the need to calibrate the precise position of the light source and the CCD camera based on the triangulation method in the prior art, the inefficiency caused by the reconstruction of the 3D model by using the surface matching algorithm to stitch the obtained object surface slices each time to complete the reconstruction of the 3D model, etc. defect, the present invention provides a three-dimensional image scanning system

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