A distortion-resistant codeband visual positioning method and system

By selecting coding blocks with small size deviation rates and choosing correction strategies based on distortion coefficients, and combining historical frames to determine motion states, the stability and accuracy issues of codeband visual positioning under tilt distortion and dynamic scenes are solved, achieving higher positioning reliability and robustness.

CN122113958APending Publication Date: 2026-05-29SUZHOU OPTICAL CODE FUTURE INTELLIGENT TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SUZHOU OPTICAL CODE FUTURE INTELLIGENT TECHNOLOGY CO LTD
Filing Date
2026-02-04
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing code-based visual positioning technology is not adaptable enough to tilt distortion, resulting in decreased coding parsing accuracy and positioning stability. It also lacks a reliability assessment mechanism and is prone to introducing positioning errors and jitter in dynamic scenarios.

Method used

By acquiring the code band image sequence, the code block with the smallest size deviation rate is identified and selected as the positioning code block. An adaptive correction strategy is selected based on the distortion coefficient, and the positioning value is output through weighted summation. The motion state is determined by combining historical frames to improve positioning stability.

Benefits of technology

It improves the stability and accuracy of code tape visual positioning, enhances the adaptability to tilt distortion, reduces positioning errors and jitter risks, and improves the robustness and continuity of the system.

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Abstract

The application discloses a distortion-resistant code band visual positioning method and system. The method comprises the following steps: acquiring a code band image sequence collected by an image collection device; identifying a plurality of complete encoding blocks in a current frame, acquiring geometric scale information of the complete encoding blocks, calculating a size deviation rate according to a preset geometric scale standard and sorting, and screening a first preset number of positioning code blocks with a lower size deviation rate; determining a distortion coefficient according to average geometric scale information of the positioning code blocks and reference geometric scale information; selecting a distortion correction strategy according to a threshold interval in which the distortion coefficient is located, and performing distortion correction on the current frame and / or the positioning code; acquiring a position value according to the positioning code block after the distortion correction, and performing a normalized weighted summation operation on each position value to output a positioning value, wherein the weight of the position value is negatively correlated with the size deviation rate of the corresponding positioning code block. Through the sorting and screening mechanism and the distortion quantization and partition correction strategy, the positioning stability and robustness under the condition of tilt distortion are improved.
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