Computer binocular vision denture scanning device and three-dimensional reconstruction method thereof

Abstract

The invention relates to a computer binocular vision denture scanning device and a three-dimensional reconstruction method thereof. The device comprises a linearly structured light vision collection part, a rotary measuring bed, a control part of the rotary measuring bed, and a box, wherein two high resolution digital charge coupled device (CCD) cameras are positioned on the central sides above the rotary measuring bed and the control part of the rotary measuring bed and symmetrically distributed by taking the linearly structured light laser as the centre in the linearly structured light vision collection part; first and second accessories in the rotary measuring bed and the control part of the rotary measuring part are arranged on the rotary measuring bed; the rotary measuring bed is driven by a driving mechanism to rotate; and the structures are arranged in the box. The method comprises: placing a denture on the rotary measuring bed; allowing the linearly structured light laser to project laser on the denture; driving the rotary measuring bed to rotate continuously by the driving mechanism; and taking pictures by two CCD cameras and transmitting the pictures to an external control computer to process the pictures to obtain three-dimensional data on the denture surface. In the invention, the mechanical structure and the control method need no various speed control, have no requirement on precision of spindle rotation of a motor, and are convenient to operate and high in scanning precision.

Description

technical field [0001] The invention relates to denture scanning technology in the technical field of measurement and testing, in particular to a computer binocular vision denture scanning device and a three-dimensional reconstruction method thereof. Background technique [0002] The development of computer vision technology provides strong technical support for the application of non-contact three-dimensional measurement technology in reverse engineering, industrial inspection and quality control. At the same time, the increasingly wide application in these fields also promotes the development of visual three-dimensional measurement technology . Such as structured light measuring instrument, triangulation method using line laser or spectral laser. Computer vision measurement technology has been widely used in denture scanning equipment due to its convenience, speed and accuracy. At present, denture scanning equipment using non-contact computer vision three-dimensional mea...

AI Technical Summary

Problems solved by technology

At present, denture scanning equipment using non-contact computer vision three-dimensional measurement technology mainly adopts two methods. One is to project a surface grating onto the surface of the denture when measuring the denture, and a CCD camera captures the image to extract three-dimensional points on the denture surface. The data is sampled, neither the denture nor the camera moves during the measurement, this method requires a complex raster projection setup

Another method is to project linear structured light onto the surface of the denture, and then take an image with a CCD camera to extract the three-dimensional sampling points of the light strip on the surface of the denture. Three-dimensional point sampling point data, every time a certain angle is rotated, the CCD camera will take an image, and all the data will be fused together through the precise rotation angle controlled by the computer. high cost

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