Z-Dimension Biometric Feedback via Image Brightness
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Solution Overview
Problem
Current biometric capture devices face challenges in providing effective feedback for users to align themselves correctly in all dimensions, particularly the Z-dimension, as existing methods are either imprecise, require attention diversion, or fail to provide adequate distance information.
Innovation Solution
A Z-dimension user-feedback system that uses cameras and processing elements to capture and display subject images with exaggerated qualities, such as brightness or darkness, to indicate whether the subject is too close or too far, allowing for simultaneous X, Y, and Z dimension alignment without requiring users to focus on separate indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If text feedback is used to guide user alignment, then alignment information is provided, but user attention must be diverted from the biometric sample to read the text
Solution Approach 1:
The patent applies color changes to the electronic mirror feedback to indicate Z-dimension alignment status. The system changes the color or intensity of the displayed image or specific regions based on whether the subject is too close, too far, or properly positioned. This allows users to understand alignment requirements through visual color cues without needing to read text, eliminating attention diversion while maintaining clear communication of alignment information.
2Loss of information
If audio feedback is used to provide Z-dimension alignment guidance, then distance information is communicated, but the feedback is slow and imprecise
Solution Approach 1:
The system uses color intensity or hue changes in the electronic mirror display to communicate precise distance information. Different colors or brightness levels correspond to different Z-dimension positions, allowing users to instantly understand their alignment status without waiting for audio processing. This visual color-coding system provides both speed and precision, as the feedback is immediate and the graduated color scale indicates specific distance ranges.
3Device complexity
If simple visual indicators are used for alignment, then the interface is simple, but adequate Z-dimension feedback is not provided since subjects remain visible at all distances
Solution Approach 1:
The patent implements color changes or intensity modifications on the electronic mirror display to provide precise Z-dimension feedback while maintaining interface simplicity. The system overlays color-coded indicators or modifies the overall image appearance based on subject distance, allowing users to intuitively understand their positioning without adding complex separate indicators. This approach preserves the simplicity of the visual interface while encoding precise distance information through color variations.
4Measurement precision
If the capture volume is reduced to improve focus, then image quality improves, but the field of view shrinks making alignment more difficult
Solution Approach 1:
The system uses the electronic mirror display to provide real-time feedback about the subject's position relative to the optimal capture volume. By showing users their reflected image with color-coded alignment indicators, the system guides them to self-correct their positioning. This feedback mechanism allows the system to maintain a smaller, higher-quality capture volume while still enabling easy alignment, as users can see and adjust their position based on the visual feedback without needing a large field of view.
Data Source
AI summary
Embodiments of a Z-dimension user-feedback biometric system are provided. In some embodiments, a camera captures subject images positioned along a plurality of Z-dimension positions, including a normal subject image for a mid-range of a capture volume and one or both of the following: (a) a close subject image for a front of the capture volume and (b) a far subject image for a back of the capture volume. In some embodiments, a processing element can be configured to create a normal display image, as well as a close display image (with a first exaggerated quality) and/or a far display image (with a second exaggerated quality). In some embodiments, the first exaggerated quality can be a positive exaggeration of a quality and the second exaggerated quality can be a negative exaggeration of the quality.