Three-dimensional scanner space coordinate positioning method

Abstract

An embodiment of the invention discloses a three-dimensional scanner space coordinate positioning method, which can calculate scanner coordinate values of a to-be-measured point in an object. The three-dimensional scanner space coordinate positioning method comprises the steps of: arranging a reference coordinatograph on the periphery of the object; capturing scanner coordinate values of a plurality of control points on the reference coordinatograph by means of a three-dimensional scanner; taking the plurality of control points as reference nodes, and establishing a spatial position topological relation between the to-be-measured point in the object and the plurality of control points on the reference coordinatograph under a scanner coordinate system; and calculating scanner coordinates ofthe to-be-measured point by utilizing the scanner coordinates of the control points according to the topological relation. The three-dimensional scanner space coordinate positioning method overcomesthe defect that the three-dimensional scanner cannot capture internal points of the object, indirectly captures the to-be-measured point in the object through scanning tripod positioning points of theexternal coordinate reference coordinatograph, makes the deployment and control mode in the scanner calibration process more flexible, and improves the calibration quality.

Description

technical field [0001] Embodiments of the present invention relate to the technical fields of medical image processing and surgical navigation, and in particular to a spatial coordinate positioning method for a three-dimensional scanner. Background technique [0002] With the rapid development of 3D scanning technology, the scanning accuracy and scanning efficiency of scanning equipment are getting higher and higher. At present, research on the combination of 3D scanning equipment and medical imaging equipment has been carried out at home and abroad, and 3D scanning technology is applied to medical image reconstruction and matching. In the quasi-field, the surface data formed by scanning is combined with the volume data of CT, MRI, PET and other professional medical images to achieve real-time positioning during the operation. In this application scenario, it is necessary to accurately locate the triangular surface data collected by the 3D scanner to the corresponding anatom...

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Problems solved by technology

[0006] For this reason, the embodiment of the present invention provides a three-dimensional scanner spatial coordinate positioning method to solve the problem in the prior art that the scanner coordinate system coordinate values ​​of certain points inside the object cannot be obtained during the scanner calibration process. The problem of scanning and positioning the positioning point and the internal measurement point of the object

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