English

Hyperspectral imaging technology: a comprehensive guide from principles to applications

180
2024-04-16 17:35:15
See translation

Hyperspectral imaging technology is a highly anticipated innovation in the field of science and engineering today. It not only integrates spectroscopy and imaging technology, but also has wide applications in various industries and research fields. This article will delve into the basic principles, working mechanisms, and applications of hyperspectral imaging in different fields.

Introduction to hyperspectral imaging
Hyperspectral imaging is a technique that utilizes spectral information to obtain the spectrum of each pixel in an image. Compared to traditional imaging systems, hyperspectral imaging can provide more detailed information on object and surface features. By analyzing the unique spectral characteristics of objects and materials, it is possible to identify and quantify them.

Spectral imaging systems can capture electromagnetic spectra ranging from visible light to infrared, providing rich spectral data. This technology is widely used in fields such as food quality and safety, waste classification and recycling, and drug production control.

2. Working principle
Hyperspectral imaging utilizes an imaging spectrometer (also known as a hyperspectral camera) to collect light from a scene and decompose it into various wavelengths or spectral bands. Through this method, a two-dimensional image of the scene can be obtained and the spectral information of each pixel can be recorded. In the final hyperspectral image, each pixel corresponds to a unique spectrum, similar to a fingerprint.

This unique spectrum can be used to identify and quantify objects and materials in the scene. Due to the different reactions of different materials to light, their spectral characteristics are also different. Therefore, object recognition and classification can be achieved through spectra.

3. Information provided
The hyperspectral imaging system provides rich spatial and spectral information, which can be used to solve the problems of "what" and "where". Spectral information allows for recognition and classification of objects, while spatial information provides data on object distribution and regional separation.

Compared to traditional RGB cameras, hyperspectral imaging can provide more detailed and rich information. By analyzing thousands or even hundreds of thousands of spectra, large-scale hyperspectral data cubes containing position, wavelength, and time related information can be obtained, enabling detailed characterization of objects.

4. Application field
Hyperspectral imaging technology has a wide range of applications in various fields:
-Environmental monitoring: used to monitor land use, vegetation health, and water quality changes, as well as detect early signs of ecological degradation.
-Mineral exploration: used to create mineral deposit maps, detect mineral composition and grade.
-Quality control: can be used for non-destructive testing and grading of food, as well as detection of pollutants and defects in industrial products.
-Waste management: can be used to separate various materials and increase the value of recycled materials.
-Agriculture: used to evaluate crop health and yield, monitor soil moisture and nutrient content.
-Military surveillance: used to detect and identify hazardous materials.

epilogue
Hyperspectral imaging technology, as a powerful tool, plays an important role in scientific research, industrial production, and environmental monitoring. With the continuous advancement of technology and the expansion of application scenarios, it is believed that hyperspectral imaging will play an increasingly important role in the future and make greater contributions to the development of human society.

Source: Sohu

Related Recommendations
  • BLT launches a new BLT-S800 metal PBF 3D printer equipped with 20 lasers

    Bright Laser Technologies (BLT), a global leader in additive manufacturing headquartered in China, has launched a new BLT-S800 metal 3D printer with a super large construction volume (800 mm x 800 mm x 600 mm) and a 20 fiber laser configuration, which can shorten part delivery time and achieve rapid customer manufacturing.The BLT-S800 system supports titanium alloy, aluminum alloy, high-temperatur...

    2023-10-19
    See translation
  • NASA plans to use lasers to measure the impact of exhaust gases on the lunar surface during landing, in order to plan lunar landings more effectively

    Recently, NASA's official website showed that a research team at the University of Central Florida has tested an instrument called Ejecta STORM, which aims to measure the size and velocity of surface particles generated by exhaust gases from rocket powered landers on the moon or Mars.According to NASA, when a spacecraft lands on the moon or Mars, rocket exhaust plumes can produce efflorescent ejec...

    2023-10-31
    See translation
  • Alcon acquires ophthalmic laser equipment company for $466 million

    On July 3rd local time, Swiss ophthalmic care giant Alcon announced the acquisition of Israeli medical technology company Belkin Vision and its laser equipment assets for treating glaucoma.The transaction includes a prepayment of $81 million, of which approximately $65 million is in cash. In addition, if Alcon can establish this technology as the preferred first-line treatment option for clinical ...

    2024-07-09
    See translation
  • High precision laser linkage platform to help precision processing

    With the trend of industrial intelligence and precision processing, the demand for laser precision processing in precision 3C industry, machinery and equipment, new energy vehicles and other industries has developed rapidly, making the application of laser processing technology in the industrial field more comprehensive promotion.Due to the inherent nonlinear characteristics between optics and sca...

    2023-09-11
    See translation
  • Overview of ultrafast laser micro nano manufacturing technology: material processing, surface/interface control, and device manufacturing

    Researchers from Tsinghua University have summarized the research on ultrafast laser micro nano manufacturing technology, including material processing, surface/interface control, and device manufacturing. The relevant review titled "A Review of Ultrafast Laser Micro/Nano Fabric: Material Processing, Surface/Interface Control, and Device Fabric" was published in Nano Research.Ultra fast laser proc...

    2024-08-06
    See translation