Multispectral Imaging Exposure Control for Selected Wavelength Bands
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Solution Overview
Problem
Conventional imaging systems struggle to achieve appropriate exposure and focus for specific wavelength bands in multispectral imaging, leading to inaccurate image capture when attention is not paid to a desired wavelength band.
Innovation Solution
An imaging device and system that includes a spectroscopic element to disperse incident light into multiple wavelength bands, an image sensor to capture images, and a controller to adjust exposure and focus based on user-selected wavelength bands, using luminance values from multispectral image data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional imaging systems capture images across multiple wavelength bands without wavelength-specific exposure control, then the system can obtain multispectral image data, but the exposure accuracy for specific desired wavelength bands deteriorates
Solution Approach 1:
The imaging system dynamically adjusts exposure parameters (shutter speed, aperture, ISO) based on the selected wavelength band. The controller modifies exposure settings in real-time according to the luminance characteristics of the target wavelength band, enabling precise exposure control for each specific band while maintaining the ability to capture across multiple bands.
Solution Approach 2:
The system changes exposure parameters (exposure time, aperture size, sensitivity) according to the selected wavelength band's luminance characteristics. By adjusting these parameters based on the specific wavelength band requirements, the system achieves accurate exposure for the desired band while preserving multispectral imaging capability.
2Measurement precision
If the imaging system uses fixed exposure settings for all wavelength bands, then the device complexity is reduced, but the image capture accuracy for specific wavelength bands deteriorates
Solution Approach 1:
The system incorporates feedback by measuring the luminance value of the selected wavelength band and using this information to automatically adjust exposure parameters. The controller receives luminance information from the image sensor and modifies exposure settings accordingly, creating a closed-loop control system that ensures accurate exposure without requiring complex manual intervention.
Solution Approach 2:
The imaging system performs self-adjustment of exposure parameters based on the luminance characteristics of the selected wavelength band. The controller automatically determines appropriate exposure settings using the captured image data and luminance values, eliminating the need for external calibration or complex user configuration while maintaining high image capture accuracy.
3Productivity
If the imaging system captures images for all wavelength bands simultaneously, then the productivity is improved, but the exposure appropriateness for user-desired specific bands deteriorates
Solution Approach 1:
The system performs preliminary measurement of the luminance value for the selected wavelength band before finalizing the exposure settings. By预先 assessing the luminance characteristics of the target band, the controller can pre-adjust exposure parameters to ensure appropriate exposure for the user-desired band while maintaining the capability to capture all wavelength bands efficiently.
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 appropriate exposure and focus for desired wavelength bands, ensuring accurate image capture across multiple spectral ranges.
Implementation Method 1
a spectroscopic element that disperses incident light into more than three plurality of wavelength bands
Data Source
AI summary
An imaging device includes: a spectroscopic element that disperses incident light into more than three plurality of wavelength bands; an image sensor that captures a subject image via the spectroscopic element to generate image data; an input interface that receives first selection information indicating a first wavelength band selected by a user from the plurality of wavelength bands; and a controller. The controller adjusts exposure based on a luminance value of a piece of image information that is included in multispectral image data and corresponds to the first wavelength band, the multispectral image data including pieces of image information corresponding to the plurality of wavelength bands, respectively.