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Hyperspectral imaging collects and processes information from across the electromagnetic spectrum. The goal of hyperspectral imaging is to obtain the spectrum for each pixel in the image of a scene, with the purpose of finding objects, identifying materials, or detecting processes. There are three general types of spectral imagers. There are push broom scanners and the related whisk broom scanners (spatial scanning), which read images over time, band sequential scanners (spectral scanning), which acquire images of an area at different wavelengths, and snapshot hyperspectral imagers, which uses a staring array to generate an image in an instant. Whereas the human eye sees color of visible light in mostly three bands (long wavelengths, perceived as red; medium wavelengths, perceived as green; and short wavelengths, perceived as blue), spectral imaging divides the spectrum into many more bands. This technique of dividing images into bands can be extended beyond the visible. In hyperspectral imaging, the recorded spectra have fine wavelength resolution and cover a wide range of wavelengths. Hyperspectral imaging measures continuous spectral bands, as opposed to multiband imaging which measures spaced spectral bands. Engineers build hyperspectral sensors and processing systems for applications in astronomy, agriculture, molecular biology, biomedical imaging, geosciences, physics, and surveillance. Hyperspectral sensors look at objects using a vast portion of the electromagnetic spectrum. Certain objects leave unique "fingerprints" in the electromagnetic spectrum. Known as spectral signatures, these "fingerprints" enable identification of the materials that make up a scanned object. For example, a spectral signature for oil helps geologists find new oil fields.

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Article title : Hyperspectral imaging
"types of spectral imagers. There are push broom scanners and the related whisk broom scanners (spatial scanning), which read images over time, band sequential..."
Article title : Image scanner
"An image scanner (often abbreviated to just scanner) is a device that optically scans images, printed text, handwriting, or an object and converts it..."
Article title : Multispectral imaging
"red. Such images allow the water depth, vegetation coverage, soil moisture content, and the presence of fires to be seen, all in a single image. Many other..."
Article title : PNG
"Format (GIF). PNG supports palette-based images (with palettes of 24-bit RGB or 32-bit RGBA colors), grayscale images (with or without an alpha channel for..."
Article title : Chemical imaging
"mathematically treated as a series of spectrally resolved images (each image plane corresponding to the image at one wavelength) or a series of spatially resolved..."
Article title : Imaging spectrometer
"acquisition of spatially coregistered images in many spectrally contiguous bands. Some spectral images contain only a few image planes of a spectral data cube..."
Article title : Kanyakumari district
"terms of per capita income, and also tops the state in Human Development Index (HDI), literacy, and education. The district's headquarters is Nagercoil..."
Article title : James Webb Space Telescope
"targets for Webb images". Ars Technica. Archived from the original on 8 July 2022. Retrieved 8 July 2022. "First Images from the James Webb Space Telescope"..."
Article title : Computational imaging
"coded measurements, diffraction patterns, phase-shifted images, time-of-flight signals, or images captured under different illumination conditions. A computational..."
Article title : False color
"display images in colors which were recorded in the visible or non-visible parts of the electromagnetic spectrum. A false-color image is an image that depicts..."

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