Multi-frequency phase-shift tooth three-dimensional reconstruction method

Abstract

The invention discloses a multi-frequency phase-shift tooth three-dimensional reconstruction method, which comprises the following steps of: A: projecting multiple frames of fringe grating images withcertain phase shift to a tested object through a projector; B: collecting an object image with a grating by a camera, and transferring the object image to a PC host; C: adopting a multi-frequency heterodyne phase-shift algorithm to calculate the continuous relative phase value of the object image; D: unfolding the obtained relative phase value to carry out three-dimensional reconstruction to obtain the absolute phase value of the grating; and E: on the basis of the calibration parameter of the camera, calculating the true data of the tooth, and after multiple pieces of multi-angle point clouddata images are adopted to be spliced, combining and packaging data by software to obtain the hook face of a tooth model. By use of a structured light way, through a multi-frequency phase-shift way,the tooth is subjected to three-dimensional reconstruction, the way can effectively lower cost, and on the basis of a low cost, a data formation purpose of the tooth model can be quickly and effectively realized.

Description

technical field [0001] The invention relates to oral cavity measurement technology, in particular to a multi-frequency phase-shift tooth three-dimensional reconstruction method. Background technique [0002] The production process of traditional oral restorations is as follows: preparation of restorations according to the patient's lesion condition → occlusal materials such as silica gel or resin, copying the shape of oral teeth, perfusion with gypsum, copying the oral tissue morphology model → combining the oral condition of the patient on the model , make specific design → In the technical center, full-time technicians complete various complicated processes such as cutting the mold, applying spacer, carving wax, etc. → Finally, the metal restoration is embedded and cast, and the porcelain layer is evenly baked on the porcelain furnace , translucent beautification, complete the production of the prosthesis → after fine processing to meet the requirements, try fitting, posit...

AI Technical Summary

Problems solved by technology

[0032] The problem with the current oral measurement method is that the cost is high and the charges are high. Due to the different use schemes, the hardware cost of foreign products is very high, and the software will charge a certain fee every year, resulting in an expensive overall price.

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