Optical Marker With Angular Substructures For Recognition Accuracy
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Solution Overview
Problem
Existing methods for generating optical markers for image processing, photogrammetry, and motion detection face challenges in achieving accurate recognition under poor resolution or poor recording conditions, such as smoke or darkness, and struggle with large detection ranges and low minimum resolution.
Innovation Solution
A method for generating optical markers using a regular pattern of angular structures and substructures with different colors, where substructures occupy a significant portion of the projection surface, allowing for unique minimum recognition areas, enabling flexible adaptation to detection conditions and environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical marker uses a regular pattern of angular structures and substructures with different colors, then the recognition accuracy is improved, but the device complexity increases
Solution Approach 1:
The optical marker is segmented into multiple angular structures arranged in a regular pattern, with each structure containing substructures of different colors. This segmentation allows the detection system to identify individual structures and their color sequences, improving recognition accuracy while maintaining a systematic organization that manages complexity
Solution Approach 2:
Different regions of the marker (individual angular structures) have local quality variations through color differences in substructures. Each structure contains substructures with specific color sequences that provide local identification information, enabling accurate recognition while the regular overall pattern maintains systematic complexity management
2Length of stationary object
If the substructures occupy a larger portion of the projection surface, then the detection range is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The marker is divided into multiple angular structures that can be distributed over a larger area. Each structure contains substructures that occupy a significant portion of the projection surface, extending the detection range while the segmented organization provides tolerance for manufacturing variations
Solution Approach 2:
The substructures are designed to occupy a larger than minimum necessary portion of each angular structure's projection surface. This excessive coverage ensures detection across larger ranges and under poorer conditions, while the regular pattern provides a framework that tolerates the increased manufacturing complexity
3Ease of operation
If the optical marker is designed for low minimum resolution, then the ease of operation is improved, but the measurement precision deteriorates
Solution Approach 1:
The marker uses color variations in substructures within each angular structure to encode identification information. The color sequences provide distinctive signatures that enable precise recognition even when the overall marker is captured at low resolution, as color information can be distinguished with fewer pixels than detailed geometric features
Solution Approach 2:
The regular pattern of angular structures with internal substructure segmentation allows the system to identify the marker as a whole at low resolution, then progressively resolve individual structures and their color sequences for precise recognition, easing operation while maintaining measurement precision
Data Source
AI summary
A method for generating an optical marker for image processing/photogrammetry/motion detection using an output unit and/or a control and/or regulation unit. The optical marker is output/generated in such a way that the represented optical marker is formed by a regular pattern of angular structures and by substructures, each of which is situated completely within one of the structures. In each case, at least two directly adjacent structures, viewed in at least two mutually perpendicularly oriented directions along a projection plane of the optical marker, have different colors, and a color sequence of the plurality of structures periodically repeats along the two directions. The optical marker is formed from unique minimum recognition areas within the optical marker. The optical marker is output/generated in such a way that the substructures each include an imaging surface that corresponds to at least 15% of a maximum projection surface spanned by one of the structures.