3D Hyperspectral Imaging Using Diffractive Pattern Projection
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Solution Overview
Problem
Existing 3D hyperspectral imaging systems are limited by high costs and size due to the combination of expensive hyperspectral sensors and 3D cameras, which reduces their practicality.
Innovation Solution
A system using a projector, diffractive optical element, and camera to derive 3D and hyperspectral information with high accuracy, employing patterns and optimization techniques to process images through a diffractive optical element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If expensive hyperspectral sensors and 3D cameras are combined, then high-resolution 3D hyperspectral data can be obtained, but cost and device size increase significantly
Solution Approach 1:
The patent replaces expensive hyperspectral sensors with a standard camera that captures images at multiple wavelengths. By using a projector to illuminate the scene with different wavelength patterns and a standard camera to capture the reflected light, the system achieves hyperspectral imaging functionality without requiring costly specialized sensors. This substitution of expensive components with cheaper alternatives directly resolves the contradiction between measurement precision and device cost.
Solution Approach 2:
The patent segments the hyperspectral imaging process into multiple sequential wavelength captures. Instead of capturing all wavelengths simultaneously with a single expensive sensor, the system projects patterns at different wavelengths sequentially and captures them with a standard camera. This segmentation allows the use of inexpensive components while achieving the same measurement precision as expensive hyperspectral sensors.
2Measurement precision
If multiple patterns are projected and captured sequentially, then hyperspectral information accuracy improves, but imaging time increases
Solution Approach 1:
The patent employs periodic projection of patterns at different wavelengths to capture hyperspectral information. By systematically projecting patterns at multiple wavelengths in a periodic sequence and capturing them with a standard camera, the system achieves accurate hyperspectral data without requiring expensive sensors. The periodic nature of the wavelength switching allows for efficient data collection while maintaining measurement precision.
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 high-accuracy 3D hyperspectral imaging with a low-cost, compact device configuration, reducing errors and improving practicality.
Implementation Method 1
a diffractive optical element disposed in front of the projector; a camera configured to obtain an image generated by a pattern, irradiated from the projector, passing through the diffractive optical element
Data Source
AI summary
Provided is a system, a method and an apparatus for 3D hyperspectral imaging, and the system for 3D hyperspectral imaging includes a projector configured to irradiate one or more patterns; a diffractive optical element disposed in front of the projector; a camera configured to obtain an image generated by a pattern, irradiated from the projector, passing through the diffractive optical element; and an imaging device configured to derive 3D information and hyperspectral information of pixels included in the image based on information of the pattern irradiated from the projector, wherein the imaging device derives the hyperspectral information by performing optimization for each pixel included in the image.