Force Line Superimposition on Body Images
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Solution Overview
Problem
Existing display systems for representing ground reaction forces face challenges in accurately projecting force application lines onto the human body, requiring rigid geometric alignment, cumbersome filming, and difficulties in data storage and analysis, leading to inaccuracies and complex setups.
Innovation Solution
A method and system that use a measuring platform with sensors and a camera to detect horizontal and vertical forces, superimpose force application lines onto images, and utilize marker points for image analysis to determine the platform's position and orientation, allowing for flexible setup and accurate representation of force application lines without rigid geometric allocation, enabling improved adjustment of orthopedic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a rigid geometric allocation of projector to measuring platform is used, then the force application line can be accurately projected onto the body, but the system complexity increases and flexibility decreases
Solution Approach 1:
The patent replaces the mechanical/optical projection system with a digital image processing system. Instead of using a projector to physically project force vectors onto the body, the system captures images with a camera, detects marker points on the measuring platform, calculates force application lines digitally, and superimposes them on the captured images. This substitution eliminates the need for rigid geometric allocation between projector and measuring platform while maintaining measurement accuracy.
Solution Approach 2:
The patent creates a digital copy of the measuring platform's coordinate system by detecting marker points and establishing a geometric relationship between the camera and measuring platform. The force application lines are then calculated and superimposed on the digital image copy rather than requiring physical projection, thereby reducing system complexity while preserving measurement precision.
2Loss of information
If filming of the person is performed, then the force vectors can be visualized on the body, but the operation becomes cumbersome and time-consuming
Solution Approach 1:
The patent replaces the complex filming and manual alignment process with automated digital image capture and processing. The camera automatically captures images of the person on the measuring platform, and the system automatically detects marker points, calculates force application lines, and superimposes them on the images without requiring manual filming operations.
Solution Approach 2:
The system performs self-alignment and self-calibration by automatically detecting the geometric relationship between the camera and measuring platform through marker point detection. The force application lines are automatically calculated and superimposed on the captured images without requiring manual intervention for alignment or positioning.
3Measurement precision
If data storage and processing is performed for quantification, then accurate analysis is achieved, but the process becomes difficult or impossible to represent
Solution Approach 1:
The patent creates a complete digital copy of the measurement process by capturing images with the camera and storing both the image data and measurement data in digital form. The force application lines are calculated based on the detected marker points and superimposed on the digital images, allowing for easy storage, processing, and analysis without requiring complex physical data representation systems.
Solution Approach 2:
The patent merges the image data from the camera with the measurement data from the measuring platform into a unified digital representation. The force application lines are calculated by combining the geometric relationship from marker point detection with the force measurement data, and both types of data are stored together for simultaneous analysis.
4Loss of information
If a projector is allocated to the measuring platform, then force vectors can be projected, but production costs significantly increase
Solution Approach 1:
The patent replaces the expensive projector hardware with a more cost-effective digital image processing system. Instead of purchasing and maintaining a projector and its associated alignment mechanisms, the system uses a camera to capture images and digitally superimposes force application lines through software processing, significantly reducing production costs while maintaining the ability to represent force vectors.
Solution Approach 2:
The patent creates a digital copy of the force vector representation process, eliminating the need for expensive physical projection hardware. The force application lines are generated and displayed as digital overlays on captured images, providing a cost-effective alternative to projector-based systems.
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 allows for positionally accurate representation of force application lines, reducing production costs, enabling flexible system setup, and facilitating patient involvement in measurement adjustments, while ensuring accurate data analysis and storage, independent of light conditions.
Implementation Method 1
marker points with a fixed geometric relation to the measuring platform are detected on the measuring platform by the at least one camera device
Implementation Method 2
the position and/or orientation of the measuring platform to the at least one camera device is determined via an image analysis of the detected marker points
Implementation Method 3
horizontal and vertical forces as well as free moments, if applicable, are detected, which are exerted by a person located on the measuring platform
Data Source
AI summary
A method for determining the alignment of a system, wherein the system includes measuring and display devices. The measuring device has a measuring platform and detects horizontal and vertical forces that are exerted by a person located on the measuring platform. The system also includes at least one camera device used to at least partially photograph the person located on the measuring platform. The method includes transmitting image data from the at least one camera device and measurement data from the measuring device to the display device, superimposing a force application line in the display device on the image data, and displaying the force application line on the image of the person located on the measuring platform. The method also includes detecting marker points with a fixed geometric relation to the measuring platform by the at least one camera device, wherein the geometric relationship of the marker points to one another is known, and determining the position and/or orientation of the measuring platform to the at least one camera device via an image evaluation of the detected marker points.