Adaptive Bottom Elimination Method for 3D Scanning Data

Abstract

The invention discloses a three-dimension scanning data self-adaptive bottom surface elimination method, which comprises the following steps: S1) projecting three-dimension scanning data to an approximate projection plane through coordinate transformation; S2) forming data arranged in the matrix form according to the data on the approximate projection plane, carrying out region partition on the data, establishing a local coordinate system for data in each subregion, and carrying out conversion on the data in each subregion in the corresponding local coordinate system; S3) for each subregion, calculating corresponding coordinate value on a rubbing reference plane according to the coordinate value of each data in the corresponding local coordinate system by utilizing difference parameters; and S4) projecting the data on the rubbing reference plane and obtained in the step 3) to a plane, and then, carrying out denoising. The method directly processes the global three-dimensional data on the basis of not converting into surface rendering model data under the condition of not reducing original three-dimension data precision; and in the processing process, interference on data due to participation of excessive workers is prevented.

Description

technical field [0001] The invention belongs to the field of calligraphy rubbing, and more specifically relates to an adaptive bottom surface elimination method of three-dimensional scanning data. Background technique [0002] 3D scanning can be applied to many fields, such as manufacturing, reverse engineering, medicine, cultural industries, etc. Three-dimensional scanning instruments are divided into different categories according to different principles, but they all collect point cloud data. In the prior art, the processing of point cloud data is carried out in three-dimensional space, and the processing methods are basically divided into two categories: [0003] 1. Use professional software to reconstruct the point cloud into a surface model, and then import it into the modeling forward processing software for model editing. [0004] 2. According to the behavioral characteristics of the point cloud data, use reverse engineering software to reconstruct it into a curved...

AI Technical Summary

Problems solved by technology

[0011] When the above method is used to process the scanned data of bell inscriptions, it is necessary to reduce the amount of point cloud data for format conversion in order to use the existing tools to remove the bottom surface of the scanned data of bell inscriptions, so as to meet the requirements of different processing software for the original data. This process not only increases a lot of processing time and redundant data information, but also loses the details that are crucial to the processing results, so that the later model results are distorted

[0012] In addition, in the existing technology, in the work of removing the bottom surface, the operator needs to edit the model data after the simplified data under the subjective consciousness, which requires the operator to have certain experience and 3D software operation skills, which leads to everyone's processing The result is not the same, and it cannot fully reproduce the information carved on the surface of the bell inscription

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