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Colour-infrared images provide a different perspective

For many applications, particularly those involving vegetation and wetlands, the fourth band in an aerial imagery product provides a wealth of information. The fourth band refers to the near-infrared (NIR) wavelength in the electromagnetic spectrum, invisible to the human eye but a valuable tool for image analysis and change detection. A colour-infrared (CIR), or false colour image, is composed of NIR, red and green bands, while a true colour image displays the visible red, green and blue bands. By displaying the invisible NIR band as a visible band, the NIR reflectance values can be “seen” and analysed.

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