Irradiation Angle Determination for Surface Irregularity Imaging
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Solution Overview
Problem
Existing object fingerprint authentication technologies face challenges in easily acquiring high-contrast images of surface irregularities due to the need for manual adjustment of illumination conditions and high operation costs associated with imaging and collation processes.
Innovation Solution
An information processing device and method that determines an optimal irradiation angle based on the tilt statistic of surface irregularities, allowing for automatic adjustment of illumination to achieve high-contrast imaging without the need for extensive experimentation or manual adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjustment of illumination conditions is performed to achieve high-contrast images, then image quality improves, but operation cost and time increase
Solution Approach 1:
The patent applies preliminary action by pre-calculating the optimal irradiation angle using the tilt statistic of surface irregularities before actual imaging. The control unit determines the irradiation angle that maximizes image contrast based on the measured tilt distribution, eliminating the need for manual trial-and-adjustment during operation. This pre-determination of illumination parameters resolves the contradiction by preparing the optimal conditions in advance.
2Measurement precision
If experimentation under various illumination conditions is performed to determine optimal irradiation solid angle, then imaging accuracy improves, but operation cost increases
Solution Approach 1:
The system applies self-service by automatically determining the optimal irradiation angle through computational processing of the tilt statistic, without requiring manual experimentation. The control unit autonomously calculates the angle that maximizes contrast based on the measured surface irregularity distribution, eliminating the need for costly and time-consuming experimental trials under various illumination conditions.
3Reliability
If extensive collation experiments are performed to verify pattern randomness, then identification accuracy improves, but operation cost increases
Solution Approach 1:
The patent replaces mechanical experimentation with computational processing. Instead of performing physical collation experiments under various illumination conditions to verify pattern randomness, the system uses the control unit to calculate the optimal irradiation angle based on the tilt statistic, thereby obtaining high-quality images that inherently reveal the random pattern structure without requiring extensive experimental verification.
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 and cost-effective acquisition of high-contrast images by automatically determining the irradiation angle for optimal illumination, reducing operation costs and improving imaging accuracy.
Implementation Method 1
an image capture device that illuminates an object with an illuminating unit (13) and images light reflected from the object as a reflection image with an imaging unit (14)
Data Source
AI summary
The present invention relates to an information processing device used in an image capture device that illuminates an object with an illuminating unit and images light reflected from the object as a reflection image with an imaging unit. The information processing device includes an irradiation angle determining unit configured to determine an irradiation angle when the illuminating unit illuminates the object based on a tilt statistic that is a value corresponding to tilt distribution of irregularities formed on the surface of the object.