Glass substrate rotating jig alignment method and system based on visual guidance

By constructing a complex gradient vector field and a fourth-order harmonic transformation field, combined with a topological concentric constraint mechanism, the problem of difficult reference point identification in glass substrate production was solved, and high-precision, high-robust rotation fixture alignment was achieved.

CN121437640AActive Publication Date: 2026-01-30SUZHOU SHENGFENG ELECTRONIC TECH CO LTD
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Patent Information

Application Number
CN202610000443.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-04
Publication Date
2026-01-30
Estimated Expiration
2046-01-04

AI Technical Summary

Technical Problem

In glass substrate production, due to high transparency and complex background interference, traditional vision algorithms have difficulty accurately identifying reference points, resulting in a decrease in the alignment accuracy and stability of the rotating fixture.

Method used

By constructing a complex gradient vector field, utilizing the fourth-order harmonic transform field and topological concentricity constraint mechanism, and combining the gradient convergence characteristics of solid dots, high signal-to-noise ratio extraction and rotation invariance identification of reference points are achieved.

Benefits of technology

High-precision and robust glass substrate alignment was achieved in complex environments, meeting the real-time requirements of high-speed industrial production lines.

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Abstract

The invention belongs to the technical field of image processing, and particularly relates to a glass substrate rotating jig alignment method and system based on visual guidance, and the method comprises the steps: constructing a complex gradient vector field according to the gradient of each pixel point in a glass substrate grayscale image, carrying out the four-order phase mapping of the complex gradient vector field, constructing a harmonic transformation field, and carrying out the four-order phase mapping of the harmonic transformation field; calculating a square frame saliency map according to the harmonic transformation field, calculating a circular saliency map based on a complex gradient vector field by using gradient convergence characteristics of solid dots, performing dual fusion on the square frame saliency map and the circular saliency map, constructing a target probability potential energy field, and searching extreme points in the target probability potential energy field to determine true reference point coordinates. And the rotating jig is driven to execute alignment compensation. According to the invention, the interference of metal grid textures, linear scratches and circular stains can be resisted, the rotation invariance is realized, and the high-precision visual alignment is realized.
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