Biometrics Imaging Device with Time-of-Flight Camera
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Solution Overview
Problem
Biometric imaging devices face challenges in capturing high-quality image data under difficult backlight conditions without mechanical guidance, particularly in varying environmental settings, which affects the accuracy and reproducibility of biometric feature detection.
Innovation Solution
A biometrics imaging device equipped with a time of flight camera that captures three-dimensional image data to determine the difference between the current and desired body part posture, providing user guidance to adapt the posture dynamically, optimizing image capture in both visible and near-infrared light spectra without the need for mechanical aids, ensuring improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mechanical guidance devices are used to guide body part positioning, then positioning accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces mechanical guidance devices with an optical field-based solution. A light source projects a reference plane onto the body part, and sensors detect the actual position. The system uses optical fields (light projection and detection) instead of mechanical structures to achieve positioning guidance, thereby reducing device complexity while maintaining positioning accuracy.
Solution Approach 2:
The patent introduces a reference plane as an intermediary between the positioning system and the body part. The reference plane is projected onto the body part surface and serves as a visual mediator that guides positioning without requiring direct mechanical contact or complex mechanical guidance structures.
2Measurement precision
If mechanical guidance devices are used to guide body part positioning, then positioning accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive mechanical guidance devices with cost-effective optical components. By using light projection and sensor detection instead of mechanical structures, the system achieves the same positioning accuracy at lower manufacturing cost.
Solution Approach 2:
The reference plane is projected as virtual information rather than a physical object. This virtual reference can be generated and updated software-based, replacing expensive physical mechanical guides with inexpensive digital projections that can be modified without manufacturing new hardware.
3Ease of operation
If the body part is positioned in a comfortable posture for ease of use, then ease of operation is improved, but image data quality deteriorates due to backlight impact
Solution Approach 1:
The patent uses sensors to detect the actual position and orientation of the body part in real-time. This feedback information is used to calculate deviation from the desired position and provide guidance signals to the user, enabling them to achieve accurate positioning while maintaining comfortable posture.
Solution Approach 2:
The reference plane acts as an intermediary that bridges the gap between comfortable user posture and accurate positioning requirements. By projecting the reference plane onto the body part, the system provides visual feedback that guides the user to achieve both comfort and precision simultaneously.
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
The solution enables high-quality image data capture under challenging backlight conditions, improving biometric feature detection accuracy and reproducibility without mechanical guidance, and reduces the complexity and cost associated with real-time frequency analysis or expensive lenses.
Implementation Method 1
The biometrics imaging device comprises a time of flight camera configured for capturing three dimensional image data of the body part of the person
Data Source
AI summary
A biometrics imaging device for capturing image data of a body part of a person comprises a visible light sensor for capturing image data of the body part in the visible light spectrum and/or a near infrared light sensor for capturing image data of the body part in the near infrared light spectrum. The biometrics imaging device comprises a time of flight camera for capturing three dimensional image data of the body part. The biometrics imaging device executes a procedure which includes: capturing three dimensional image data of a current body part posture; determining based of the image data a difference between a desired body part posture and the current body part posture; providing based on the determined difference user guidance to enable the person to adapt the body part posture in direction of the desired posture; and capturing image data in the visible light spectrum and/or image data in the infrared light spectrum.