Biometric Enrollment Using 3D Structured Light and 2D Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional biometric facial recognition systems relying on 2D images face reliability issues due to dependency on ambient conditions, view angle, and quality of data, which is affected by shadows and movement, making them less accurate compared to other biometric systems.
Innovation Solution
A device capable of capturing both 3D and 2D images of a target's face, using an illumination unit to project a pattern for 3D image capture and a 2D image capturing device for visible light images, allowing for enhanced biometric identification and compliance with international standards, while also enabling access control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If 2D image data is used for biometric facial recognition, then the system is simple to collect and implement, but the reliability and accuracy of identification deteriorates due to dependency on ambient light conditions, view angle, and quality of data affected by shadows and movement
Solution Approach 1:
The patent transitions from 2D image capture to 3D image capture by projecting structured light patterns onto the target's face and capturing the deformed patterns. This dimensional change enables the system to obtain depth information and surface geometry, making the biometric data independent of ambient lighting conditions, view angles, and motion artifacts that plague 2D systems. The 3D facial model provides more robust and reliable identification characteristics.
2Reliability
If 3D images are used for biometric identification, then the reliability and accuracy improve by eliminating dependency on ambient conditions and movement, but the device complexity and cost increase due to additional illumination units and capturing devices
Solution Approach 1:
The patent integrates multiple functions into a single biometric system that can simultaneously capture 3D facial geometry for high-reliability identification and 2D photographic images for identification documents. The system combines structured light projection, 3D image capture, and 2D image capture in one device, allowing it to serve both security verification and documentation purposes. This multi-functionality justifies the increased device complexity by providing versatile applications.
3Adaptability or versatility
If a system captures both 3D and 2D images simultaneously, then versatility and compliance with international standards improve, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the 3D image capturing device and 2D image capturing device into a single integrated system. The structured light projection unit, 3D camera, and 2D camera are combined in one apparatus that can simultaneously acquire both 3D facial models and 2D photographs. This consolidation achieves versatility for both security and documentation applications while managing manufacturing complexity through integrated design rather than separate systems.
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 device provides robust and accurate biometric identification by capturing 3D images that are not affected by movement or position, and 2D images suitable for identification documents, enhancing security and reliability in biometric systems.
Implementation Method 1
an illumination unit adapted to project a pattern onto the surface of the target in a light wavelength not visible by the human eye
Data Source
AI summary
A device for user enrollment is adapted to capture an image of a pattern projected on a target and distorted on the three-dimensional (3D) surface of the target, such as a human face, and an image of a two-dimensional (2D) surface of the target. The device can include an illumination unit adapted to project a patterned light onto the surface of the target in an invisible light wavelength, a 3D image capturing device to capture an image of a pattern projected on the target and distorted on the 3D surface of the target. The device can also include a 2D image capturing device adapted to capture an image of a 2D frontal view of the target in visible light. The device can also include an orientation unit that displays the face of the target in order to facilitate the positioning of the target within the proper fields of view.