Biometric Finger Imaging System with Mirror Inversion Synthesis
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Solution Overview
Problem
Existing technologies fail to synthesize images that link directly imaged and mirror-inverted images of a subject's front and lateral faces effectively, limiting the accuracy of biometric authentication systems.
Innovation Solution
A biometric feature inputting system with an imager capturing the front face and lateral faces of a finger, using reflectors to reflect the lateral face images onto the imager, and an image synthesizer applying mirror inversion to combine the images, ensuring accurate linking and synthesis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mirrors or prisms are used to capture lateral face images concurrently with front face images, then imaging efficiency is improved, but the images cannot be properly linked and synthesized due to mirror inversion
Solution Approach 1:
The patent applies mirror inversion to the lateral face image to correct the orientation distortion caused by using mirrors or prisms. The synthesizer inverts the lateral face image along the direction perpendicular to the linkage line, enabling proper linkage between the front face image and lateral face image, thus resolving the image linkage accuracy problem while maintaining concurrent imaging efficiency
Solution Approach 2:
The patent introduces a synthesizer as an intermediary component that receives both the front face image and the lateral face image, performs mirror inversion on the lateral face image, and synthesizes them into a linked composite image. This intermediary processing step enables accurate image linkage without compromising the concurrent imaging capability
2Speed
If multiple imaging devices are used to capture front and lateral faces simultaneously, then imaging speed is improved, but device complexity increases
Solution Approach 1:
The patent makes a single imager perform multiple functions by using mirrors or prisms to reflect both the front face and lateral face images into the same imager. This multi-functional approach allows concurrent imaging of multiple faces with one device, maintaining imaging speed while reducing system complexity compared to using multiple imagers
Solution Approach 2:
The synthesizer acts as an intermediary that processes the reflected images from mirrors or prisms, applying mirror inversion and linkage to create a unified composite image. This intermediary processing enables a single imager to effectively capture and process multiple face views 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
This approach enhances the accuracy of biometric authentication by allowing concurrent imaging and synthesis of front and lateral face images, preventing authentication errors due to finger rotation and improving overall accuracy.
Implementation Method 1
a reflector placed on at least one side of lateral faces of the above-described figure, for reflecting an image of lateral faces of the above-described finger to the above-described imager
Data Source
AI summary
A biometrical feature inputting system including: an imager placed in front of a finger, for imaging an image of a front face of the finger, and an image of either one of lateral faces of the finger; a reflector placed on at least one side of lateral faces of the figure, for reflecting an image of lateral faces of the finger to the imager; and a synthesizer for applying mirror inversion to an imaged image of lateral faces of the finger, and synthesizing a mirror-inverted image of lateral faces of the finger and an imaged image of a front face of the finger.