Foot Biometric Measurement Using Movable Imaging and Reference Patterns
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Solution Overview
Problem
Existing methods for determining biometric data of human feet are limited in that they are cumbersome and primarily suited for measuring length and width, requiring alignment and using large, unwieldy systems with rigidly attached image recording devices and mirror systems.
Innovation Solution
A measurement method involving a freely movable imaging device with automatic detection and alignment using reference patterns, allowing for the capture of multiple images from specified trigger positions to generate three-dimensional models and determine biometric data such as foot length, width, and height, without the need for manual alignment or large equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rigidly attached image recording device and mirror system are used, then multiple views of the foot can be captured, but the system becomes large and unwieldy to operate
Solution Approach 1:
The image recording device is made freely movable instead of rigidly attached, allowing it to be dynamically repositioned to various trigger positions around the reference object. This enables the system to capture multiple views without requiring a complex rigid structure with mirrors, thereby reducing system size while maintaining the capability to obtain multiple perspectives of the foot.
Solution Approach 2:
The reference pattern is copied to multiple locations (base plate and wall element) to provide multiple reference points for the movable image recording device. This allows the device to automatically detect its position and orientation from any trigger position without requiring physical mirrors to create virtual images, simplifying the overall system structure.
2Device complexity
If manual alignment of the foot is required, then the measurement system can be simpler, but the operation becomes more time-consuming and complex
Solution Approach 1:
The image recording device automatically detects its own position and orientation relative to the reference object using the reference patterns. This self-service capability eliminates the need for manual alignment operations by the user, as the device autonomously determines trigger positions and captures images accordingly, greatly simplifying the operation while maintaining system structural simplicity.
Solution Approach 2:
The system uses reference patterns as feedback markers that the image recording device continuously detects to determine its location and orientation. This automatic feedback mechanism replaces manual alignment procedures, allowing the device to self-correct and position itself accurately without user intervention, thereby improving ease of operation without increasing system complexity.
3Device complexity
If only length and width measurements are provided, then the system can be simpler, but additional biometric data such as height and three-dimensional models cannot be determined
Solution Approach 1:
The system transitions from two-dimensional measurements (length and width only) to three-dimensional biometric data collection by adding height measurements and generating 3D models. This is achieved by capturing images from multiple trigger positions including side and angled views, then processing these images to extract three-dimensional foot characteristics, thereby expanding measurement versatility without proportionally increasing system complexity.
Solution Approach 2:
The same movable image recording device and reference pattern system serve multiple functions: capturing top-down views for length/width, side views for height, and angled views for 3D modeling. This multi-functionality allows the system to determine various biometric data types using a single integrated approach rather than requiring separate specialized systems for each measurement type.
Data Source
AI summary
The invention relates to a platform (1) for determining biometric data of human feet, comprising a base plate (3) on which at least one human foot (2) to be measured can be placed, wherein the base plate (3) has a geometric base-side reference pattern (10), characterized in that a wall element (4) arranged transversely to the base plate (3) is provided, which has a geometric wall-side reference pattern (12). The present invention further relates to a measuring system and a measuring method for determining biometric data of human feet.