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How is NDVI calculated?

NDVI is calculated in accordance with the formula: According to this formula, the density of vegetation (NDVI) at a certain point of the image is equal to the difference in the intensities of reflected light in the red and infrared range divided by the sum of these intensities.

What do NDVI values mean?

Difference Vegetation Index (NDVI) is a measure of the difference in reflectance between these. wavelength ranges. NDVI takes values between -1 and 1, with values 0.5 indicating dense vegetation. and values <0 indicating no vegetation.

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