Graphic Marker 3D Position Tracking Without Calibration
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Solution Overview
Problem
Existing methods for recording the position, location, or movement of body parts or medical instruments are often complex, offer only medium accuracy, and require frequent calibration to account for measurement errors, limiting their effectiveness and flexibility.
Innovation Solution
A method using graphic markers with known geometrical characteristics, imaged by a camera, where the processor automatically localizes and determines the marker's position and movement in three-dimensional space without manual calibration, allowing for high accuracy and flexibility with minimal equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mechanical or electromechanical detectors are used to record position and movement of body parts, then measurement capability is achieved, but device complexity and calibration requirements increase
Solution Approach 1:
The patent replaces mechanical or electromechanical detectors with an optical detection system using a camera and graphic markers. The camera records images of markers attached to body parts, and a processor device automatically determines position and movement from these images, eliminating the need for complex mechanical detection apparatus and reducing device complexity while maintaining measurement capability
Solution Approach 2:
The patent uses graphic markers that create visual copies or representations of body part positions in the form of recorded images. These markers serve as optical copies that can be captured and analyzed digitally, replacing direct mechanical measurement and simplifying the detection system while enabling automated position determination
2Measurement precision
If contactless detector systems with reflectors or illuminating points are used, then measurement capability is improved, but equipment expenditure and calibration requirements increase
Solution Approach 1:
The patent employs simple, inexpensive graphic markers that can be easily attached to body parts rather than complex, expensive reflector systems or illuminating points. These markers are straightforward optical elements that reduce equipment expenditure while still enabling accurate position determination through image recording and automated processing
3Measurement precision
If calibration is performed to increase accuracy of position determination, then measurement precision improves, but time consumption and operational complexity increase
Solution Approach 1:
The system performs automatic calibration and position determination through image recording and automated image processing. The processor device independently analyzes marker positions in recorded images and determines body part positions without requiring manual calibration procedures, eliminating time-consuming calibration steps while maintaining high measurement precision through algorithmic processing
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly enhances the accuracy of position determination and movement tracing, enabling precise localization and tracking of body parts or instruments with reduced equipment expenditure and increased automation, suitable for demanding applications like dental and orthodontic diagnostics.
Implementation Method 1
an image of at least the area of the body part comprising the graphic marker is generated by the image recording camera
Data Source
AI summary
The invention relates to a method for recording the position, location or movement of a body part of a patient and a device for recording the position, location or movement of a body part or a medical instrument. According to the invention, a graphic marker is connected with the body part or the instrument and an image of the body comprising the graphic marker is generated by an image recording camera (5, 6, 7). The image is processed by a processor device (14) as an image file. The invention is characterized in that at least one geometric size characteristic of the graphic marker is known, wherein the processor device (14) determines the position, location and/or movement of the graphic marker in the three-dimensional space and in a quantitative manner relative to the image recording camera (5, 6, 7) by means of the known size characteristic. The invention offers, without the need of manual calibration of the measuring system, a substantial automatization and a high measuring precision during the determination of position and movement in the three-dimensional space. Simultaneously, the expenditure on equipment can be reduced and the reaction to the object or body part to be measured or to the patient can be minimized.