Feature adaptive laser scanning projection graph control point extraction and optimization method

A projection graphics and laser scanning technology, applied in image analysis, image data processing, complex mathematical operations, etc., can solve problems such as missing graphics, blanks, and assembly result deviations, shorten scanning time, increase scanning frequency, and solve graphics flickering Effect

Active Publication Date: 2021-10-08
CHANGCHUN UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, the commonly used method of simplification and optimization using point geometric parameter information is applied to the simplification process of projected graphic points, and there will be graphics missing and blank phenomena, and it is impossible to retain points according to projected graphic features while ensuring the accuracy of projected graphics.
[0005] The more serious problem is that the flickering and missing phenomena of the above-mentioned projection graphics will seriously affect the accuracy of assembly and positioning of parts, causing deviations in assembly results, slowing down assembly work efficiency, and reducing the practical value of the laser scanning projection system at the manufacturing and assembly site

Method used

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  • Feature adaptive laser scanning projection graph control point extraction and optimization method
  • Feature adaptive laser scanning projection graph control point extraction and optimization method
  • Feature adaptive laser scanning projection graph control point extraction and optimization method

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Embodiment Construction

[0058] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention discloses a method for extracting and optimizing control points of feature-adaptive laser scanning projection graphics. The following will further describe the disclosed embodiments of the present invention in detail with reference to the accompanying drawings. The following examples and accompanying drawings do not constitute any limitation to the scope of protection of the present invention. Said embodiment and accompanying drawings are only used for exemplary description of the present invention, but cannot constitute any limitation to the scope of protection of the present invention. Reasonable transformations and combinations within the scope of the inventive concept all fall within the protection scope of the present invention.

[0059] Such as figure 1 As shown, a feature adaptive laser scanning projection graphic control point extraction and op...

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Abstract

The invention discloses a feature adaptive laser scanning projection graph control point extraction and optimization method, which comprises the following steps: extracting a to-be-projected contour line from a theoretical mathematical model of a to-be-projected part, and storing the to-be-projected contour line as an IGES format file; analyzing the IGES format file to obtain three-dimensional coordinate information of data points on the contour line; and according to the curvature and the normal vector included angle of each adjacent point, dividing a feature region and a non-feature region of the to-be-projected graph, thereby realizing adaptive distribution of projection control points for different graph features. Meanwhile, a control point number dilution and optimization method based on human eye spatial resolution is researched; and the diluted and optimized point is used as a control point of the projection graph to realize the projection of the contour wireframe graph. According to the invention, adaptive distribution of the density of the projection points can be carried out according to the characteristic change degree of the projection graph, and sufficient scanning projection graph shape accuracy can still be ensured on the premise that the minimum scanning control points are used.

Description

technical field [0001] The invention belongs to the field of advanced photoelectric testing instruments, and in particular relates to a feature-adaptive laser scanning projection graphic control point extraction and optimization method, which is specifically applied to intelligent auxiliary assembly positioning in the field of advanced manufacturing and assembly. Background technique [0002] Modern manufacturing has high requirements for production speed and efficiency. Rapid production, mass customization and flexible manufacturing of products are central themes of modern production. However, the on-site assembly process of large and complex products is still mostly done manually by skilled operators, and the production assembly efficiency and product quality level cannot fully meet the development requirements of modern manufacturing. The laser scanning projection system can assist operators in precise positioning of parts and auxiliary assembly operations, which can gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46G06K9/52G06T7/60G06T7/66G06F17/16
CPCG06F17/16G06T7/60G06T7/66
Inventor 侯茂盛李天雄史铮雪杨嘉亮
Owner CHANGCHUN UNIV OF SCI & TECH
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