Face Detection Device Vital Information Extraction
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Solution Overview
Problem
Existing face detection technologies often erroneously detect objects with human-like features as human faces, leading to incorrect identification, and current solutions complicate device configuration and increase costs.
Innovation Solution
A face detection device comprising an image input unit, a face region detector, a vital information extractor, and a vitality determiner that distinguishes between living and non-living faces by extracting vital information such as pulse data from image data, preventing erroneous detection of inanimate objects as human faces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated sensors or complex detection methods are used to distinguish living faces from non-living objects, then detection accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts vital information (color changes, pulse waves) from the face region of interest in the captured image, rather than using dedicated sensors. This allows distinction between living and non-living faces by analyzing subtle physiological signals present in standard image data, thereby improving detection accuracy without increasing device complexity
Solution Approach 2:
The patent uses image processing algorithms as an intermediary to analyze vital information in captured images. Instead of direct sensor contact, the system mediates between the camera and the subject by extracting physiological signals from image data, maintaining simplicity while achieving accurate living face detection
2Measurement precision
If dedicated sensors or complex detection methods are used to distinguish living faces from non-living objects, then detection accuracy is improved, but device cost increases
Solution Approach 1:
The patent makes the standard image capture function multi-functional by enabling it to perform both ordinary photography and vital information extraction. The same camera and processing unit that capture images for normal use also analyze pulse waves and color changes, eliminating the need for separate dedicated sensors and reducing overall device cost
Solution Approach 2:
The system uses its existing image capture and processing capabilities to self-serve the additional function of living face detection. By analyzing vital information already present in the captured image data, the device does not require external specialized equipment, thereby reducing manufacturing costs
3Device complexity
If standard face detection is used without vital information analysis, then device simplicity is maintained, but erroneous detection of non-living objects as faces occurs
Solution Approach 1:
The patent applies partial action by focusing vital information analysis only on the detected face region rather than the entire image. This selective approach adds minimal processing overhead to the existing face detection workflow while significantly improving reliability by verifying liveness only where needed
Data Source
AI summary
A face detection device and method are provided. The face detection device receives captured images from a camera, and extracts vital information from a face region included in the captured images. The face detection device determines, based on the vital information, whether or not a face included in the face region is in a living state, and collates a feature quantity of the face included in the face region with information of a face which is previously registered. The face detection device selects, according to a user input, whether or not to perform at least one or both of a process for the determining, and a process for the collating.