Palm Recognition Camera Layout for Higher Image Quality
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Solution Overview
Problem
Existing palm recognition devices capture low-quality palm images due to the camera directly facing the central point of the image capturing window, affecting recognition speed and accuracy.
Innovation Solution
The camera in the palm recognition device is positioned such that its projection on the image capturing window deviates downward relative to the central point, allowing it to capture images from a more optimal angle, improving image quality and recognition accuracy without altering user habits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the camera directly faces the central point of the image capturing window, then the device structure is simple and easy to manufacture, but the captured palm image quality is low
Solution Approach 1:
The camera is positioned asymmetrically relative to the image capturing window, with its projection deviating downward from the central point by a specific distance. This asymmetric positioning optimizes the capture angle for palm images, improving image quality without requiring complex adjustment mechanisms.
Solution Approach 2:
Instead of adjusting the camera's horizontal position or rotating it, the solution moves the camera along the vertical dimension (downward deviation). This dimensional change provides an optimal capture angle while maintaining a simple fixed structure that is easy to manufacture.
2Measurement precision
If the camera projection deviates downward from the central point, then the palm image quality and recognition accuracy improve, but the camera positioning becomes more complex
Solution Approach 1:
The camera's positional parameter (vertical deviation distance) is optimized to a specific range (10-30mm) to achieve the best recognition accuracy. This parameter optimization improves measurement precision while maintaining a simple fixed positioning structure that does not require complex adjustment mechanisms.
Data Source
AI summary
A palm recognition device is provided, and belongs to the field of the electronic device technologies. The palm recognition device includes a housing, a PCB, and a camera. The PCB and the camera are both located inside the housing. The housing has an image capturing window, and a projection of the camera on the image capturing window deviates downward relative to a central point of the image capturing window.