Biometric Capture Device Using Differential Imaging and Semi-Transparent Mirror
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Solution Overview
Problem
The existing methods for capturing person-specific data for identification documents are complex and costly, requiring manual input and professional photographers, which complicates the introduction of security features and background removal from facial images.
Innovation Solution
A device with a camera, semi-transparent mirror, and lighting apparatus that captures differential images to isolate the face from the background, using controlled lighting and image processing to create high-quality, biometrically correct facial images without a professional photographer, and integrates with fingerprint and document readers for comprehensive data capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual input and professional photographers are used for capturing person-specific data, then data accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The system performs automatic background removal and facial image processing without requiring professional photographers or manual intervention. The control unit automatically captures images, removes backgrounds through image processing, and prepares biometrically correct facial images for identification documents, enabling the system to serve itself in tasks previously requiring human expertise
Solution Approach 2:
The patent replaces manual mechanical processes (hand-written data input by officials, professional photography) with automated electronic systems. The control unit automatically captures images, processes them through image processing algorithms for background removal, and extracts facial features, substituting human manual operations with automated electronic image processing
2Ease of operation
If facial images with background are used for identification documents, then ease of capture is improved, but security feature integration deteriorates
Solution Approach 1:
The system extracts the facial image from its background through automated image processing. The control unit captures the facial image with background, then uses image processing to remove the background, isolating only the facial features. This extracted facial image without background enables security features to be introduced close to facial contours without covering background elements
3Productivity
If automated image capture is implemented, then productivity is improved, but image quality and background removal deteriorate
Solution Approach 1:
The patent replaces manual photography with automated electronic image capture and processing. The control unit automatically captures images and applies image processing algorithms for background removal, maintaining high image quality through automated electronic processing while significantly improving productivity by eliminating manual intervention
Solution Approach 2:
The system changes the state of the captured image through image processing, transforming it from a raw image with background to a processed image with removed background. The control unit applies image processing parameters and algorithms to automatically remove backgrounds while preserving facial image quality, enabling automated processing without sacrificing image standards
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
Enables efficient, automated capture of high-quality facial images free from backgrounds, facilitating the integration of security features close to facial contours and ensuring data accuracy through integrated biometric and document verification.
Implementation Method 1
the semi-transparent mirror is oriented such that, on the side of the semi-transparent mirror facing towards the person, the optical path of light incident on the semi-transparent mirror is parallel to the optical path of the portion of this light reflected back by the semi-transparent mirror
Implementation Method 2
generating light by means of the lighting apparatus in order to illuminate the face of the person
Data Source
AI summary
The disclosure relates to a device for capturing person-specific data of a person, wherein the person-specific data comprises a facial image of the person, wherein the device has a camera for recording the facial image of the person, a lighting apparatus, and a semi-transparent mirror, wherein the semi-transparent mirror is arranged between the person and the camera, wherein the semi-transparent mirror is oriented such that, on the side of the semi-transparent mirror facing towards the person, the optical path of light incident on the semi-transparent mirror is parallel to the optical path of the portion of this light reflected back by the semi-transparent mirror, wherein the lighting apparatus is used to illuminate the person from the front, wherein the device also has a control unit for capturing an image, by generating light by means of the lighting apparatus in order to illuminate the face of the person and, during the illumination, capturing a first image of the face of the person by means of the camera, capturing a second image of the face of the person by means of the camera without generation of the light, forming a first differential image of the first image and the second image, wherein in the first differential image the face of the person is freed from the background, wherein the person-specific data comprises the first differential image as the facial image.