![]() Aside from the obvious advantage of drones being able to cover large areas much faster than surveyors, multispectral sensors can collect data which cannot be perceived by human senses. The use of multispectral imaging generates data and intelligence at a rate and level of accuracy that cannot be matched by traditional methods. Aside from the main goal of improving overall crop health, precision agriculture also increases efficiency by minimizing waste through targeted delivery of fertilizers, pesticides, and other supplies. Precision agriculture relies on large amounts of temporal and spatial crop data to help farmers make data-driven decisions. Using drones for multispectral imaging has led to the development of a completely new discipline called precision agriculture. How these energy bands are interpreted and their value to farmers will be discussed in detail in a separate section below. They are now able to capture more discrete energy bands such as red-edge and thermal infrared. Throughout the years, multispectral sensors have become more and more sophisticated. Multispectral sensors are not limited to measuring only visible light and near-infrared energy. Near-infrared light shows a similar behavior, albeit with an inverse relationship – healthy crops absorb a smaller amount of near-infrared light. ![]() In contrast, unhealthy crops and bare soil surfaces absorb a lower amount of visible light. For instance, the presence of the chlorophyll pigment in healthy plants lead to a higher rate of absorption of visible light. The idea of analyzing multispectral images to assess crop and plant health is based on the concept of different surfaces having different rates of absorption and reflectance of particular bands of energy. However, studies have shown that these “invisible” energies can be very useful in determining the characteristics of soil, crops, and plants. Outside this frequency, energies can no longer be seen by the naked human eye. This frequency (or accordingly, wavelength) range corresponds to the colors perceptible by humans – from violet to red. These include frequency bands outside of the visible spectrum, which is limited only from 400 to 700 nm. What is multispectral imaging and how does it work?Ī multispectral image is captured by recording image data at different frequencies along the electromagnetic spectrum. Combining this with multispectral sensors has turned drones into very powerful tools for data collection and aerial imaging. The ability of drones to fly over large areas safely and quickly has been especially useful. In recent years, drones have been used for photography, advertising, filmmaking, surveillance, search and rescue, construction, and infrastructure. 3D Insider is ad supported and earns money from clicks, commissions from sales, and other ways.įar from their beginnings in the military, drones have started to enter the commercial and industrial world in a variety of ways.
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