Subject Identification Device Using Iterative Illumination
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Solution Overview
Problem
Existing subject identification techniques face challenges in accurately distinguishing between subjects with similar spectral information, leading to ambiguous identifications due to limited illumination characteristics.
Innovation Solution
A subject identification device that employs an illuminator generating light across multiple wavelength bands, an imager capturing images, and a processor analyzing spectral information to cross-check and refine illumination characteristics for precise identification, iteratively adjusting settings to differentiate between similar spectral profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single illumination characteristic is used for subject identification, then the device complexity is reduced, but the measurement precision deteriorates when subjects have similar spectral information
Solution Approach 1:
The system dynamically switches between multiple illumination characteristics based on the identification results. When initial identification is ambiguous, the processor automatically selects alternative illumination characteristics to re-acquire spectral information, enabling adaptive refinement without manual intervention
Solution Approach 2:
The system changes physical parameters of illumination light by selecting different illumination characteristics with distinct spectral power distributions. This allows the same imaging device to capture subject reflectance under multiple lighting conditions, resolving ambiguities when subjects have similar spectral signatures
2Measurement precision
If multiple illumination characteristics are tested to improve identification accuracy, then the measurement precision improves, but the loss of time increases due to repeated imaging
Solution Approach 1:
The processor evaluates identification results after each imaging operation and uses this feedback to determine whether additional illumination characteristics should be tested. This feedback mechanism prevents unnecessary repeated imaging when initial identification is already conclusive
Solution Approach 2:
The system performs partial repeated imaging only when identification ambiguity is detected. Instead of systematically testing all illumination characteristics, it selectively re-acquires data using alternative illumination settings only when needed, reducing overall time consumption
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 effectively narrows down potential identities by iteratively adjusting illumination characteristics, ensuring accurate subject identification even when multiple subjects have similar spectral information.
Implementation Method 1
an illuminator configured to generate illumination light including components at a plurality of wavelength bands
Implementation Method 2
an imager configured to generate an image signal by capturing light from a subject under the illumination light
Implementation Method 3
analyze the image signal to acquire spectral information of the subject
Data Source
AI summary
A subject identification device includes: an illuminator configured to generate illumination light including components at a plurality of wavelength bands, each of the components having a characteristic in accordance with a respective one of settings; an imager configured to generate an image signal by capturing light from a subject under the illumination light having the illumination characteristic; and a processor including hardware. The processor is configured to: define an illumination characteristic of the illumination light; analyze the image signal to acquire spectral information of the subject; and cross check the spectral information of the subject with subject identification information in order to identify the subject. When the subject is not identified, the processor is configured to define another illumination characteristic that causes spectral information of potentials for the subject to be identified, and subsequently each of the imager and the processor performs a process.