What Is Hyperspectral Imaging And Some Applications For It?
Visible light is the part of the electromagnetic, or EM for short, spectrum that the human eye, and most cameras, can see. Tools with hyperspectral imaging, on the other hand, are capable of seeing into the ultraviolet and infrared parts of the EM spectrum as well. There are many applications for this kind of imaging, especially in universities and jobs focusing on archeology, surveillance, and even agriculture. The number one advantage to using this kind of imaging technology include being able to take a wide-spectral image of an object. A person can take a hyperspectral image to tell what an object is just from the image itself. The reason why a hyperspectral camera would be able to tell what an object is would be due to the fact that many objects leave a type of electromagnetic "fingerprint" so to speak. By finding minor changes in the EM spectrum, a hyperspectral imaging device is capable of telling the difference between two seemingly identical objects. The difference between a hyperspectral and a multispectral imaging device is the number of bands that they are able to pick up. A hyperspectral camera has to analyze many more spectral bands than a multispectral camera, however, it only uses one sensor as opposed to a multispectral camera's multiple sensors. Because of the wide-spectrum images taken by a hyperspectral camera, they are heavily used in archeology, survellience, and agriculture. Archaeologists may want to take wide-spectrum pictures of a dig in order to find objects buried under the ground more easily. Because this type of imaging device takes pictures in the infrared and ultraviolet spectra, hyperspectral imaging is used a lot in survellience. A person may not be able to hide all the EM emissions coming from his or her body, and as such, a hyperspectral camera would be able to pick him or her up. Farmers use these devices to take pictures of their crops. This is because the camera is able to allow a person to tell what the health of a plant is. A hyperspectral imaging device is able to detect early stages of a disease outbreak in crops on farms. Being able to take wide-spectrum pictures is a very useful thing to do in many areas. Archaeologists tend to use hyperspectral imaging devices to pick up objects under the earth more easily. Another application is surveillance, especially because people cannot hide all their EM emissions at once. Therefore, the hyperspectral imaging device is able to pick up people easily. Farmers tend to use these imaging devices to measure the health of their crops and to detect early stages of a disease outbreak. Regardless of the application, hyperspectral imaging devices are a very useful device to have around.
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