Masquerade Detection via Image Plane Conversion
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Solution Overview
Problem
Existing masquerade detection systems require additional devices beyond the image picking-up device, such as controllable illumination and distance detection devices, to effectively detect masquerades using photographs.
Innovation Solution
A masquerade detection method that converts an image of an examining object from one angle to another by performing image conversion from one flat plane to another, allowing comparison with an image from a different angle to determine if the object is attempting to masquerade, using only an image picking-up device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional devices (illumination lamp, distance detection device) are used to detect masquerade, then masquerade detection accuracy is improved, but device complexity increases
Solution Approach 1:
The image picking-up device is made to serve dual purposes: both authentication imaging and masquerade detection. By analyzing the picked-up images for depth information and illumination characteristics, the system eliminates the need for separate distance detection devices and controllable illumination lamps, thus reducing device complexity while maintaining detection accuracy
Solution Approach 2:
The system uses its own image picking-up device to generate all necessary information for masquerade detection. The image processing unit extracts depth information and illumination characteristics from the captured images themselves, without requiring external illumination sources or distance measurement devices, making the system self-sufficient
2Measurement precision
If multiple images from different angles are captured to detect masquerade, then masquerade detection accuracy is improved, but processing time increases
Solution Approach 1:
The system pre-stores multiple images of the authentication target taken from different angles in the authentication information storage unit. During authentication, these pre-captured images are directly compared with the newly picked-up image, eliminating the need for real-time multi-angle capture and significantly reducing processing time while maintaining detection accuracy
Data Source
AI summary
To provide a masquerade detection system which can detect a masquerade using a photograph, a picture or the like, without using an additional device other than an image picking-up device. A masquerade detection method includes an image conversion step in which an image conversion from one flat plane to the other flat plane is carried out from a first image of an examining object picked up from a first angle into a second image of an examining object picked up from a second angle different from the first angle to generate a converted image, and a masquerade judging step in which the converted image and the second image are entirely or partially compared with each other and, if a compared result satisfies a predetermined condition, an attempt to do a masquerade is judged.