EVI Calculator
Compute the Enhanced Vegetation Index as 2.5 * (NIR - red) / (NIR + 6 * red - 7.5 * blue + 1) from reflectances between zero and one, rejecting degenerate reflectances that zero the denominator.
Description
Compute the Enhanced Vegetation Index as 2.5 * (NIR - red) / (NIR + 6 * red - 7.5 * blue + 1) from reflectances between zero and one, rejecting degenerate reflectances that zero the denominator.
EVI Calculator is a focused biology tool that compute the Enhanced Vegetation Index as 2.5 * (NIR - red) / (NIR + 6 * red - 7.5 * blue + 1) from reflectances between zero and one, rejecting degenerate reflectances that zero the denominator. It calculates locally from the values you enter and exposes the result without changing the source observations.1
When to use EVI Calculator
Use EVI Calculator when you need to compute the Enhanced Vegetation Index as 2.5 * (NIR - red) / (NIR + 6 * red - 7.5 * blue + 1) from reflectances between zero and one, rejecting degenerate reflectances that zero the denominator. Enter Blue reflectance, NIR reflectance, and Red reflectance using the definitions and units below so the result can be reproduced.
- Blue reflectance
- Blue-band reflectance between 0 and 1.
- NIR reflectance
- Near-infrared reflectance between 0 and 1.
- Red reflectance
- Red-band reflectance between 0 and 1.
How EVI Calculator calculates the result
The published tool contract uses this rule: Compute the Enhanced Vegetation Index as 2.5 * (NIR - red) / (NIR + 6 * red - 7.5 * blue + 1) from reflectances between zero and one, rejecting degenerate reflectances that zero the denominator.
- EVI
- EVI value; signed and typically below one.
Limitations of EVI Calculator
The calculation does not propagate measurement uncertainty, sampling error, or biological and chemical variability. Blue reflectance must remain between 0 and 1; NIR reflectance must remain between 0 and 1.
Alternative or Complementary measurements
Retain the original Blue reflectance, NIR reflectance, and Red reflectance values and their units alongside the result. NDVI Calculator is useful when you instead need to compute the Normalized Difference Vegetation Index as (NIR - red) / (NIR + red) from reflectances between zero and one, rejecting dark pixels whose reflectances sum to zero. Two-Band EVI provides another view by helping you compute the two-band Enhanced Vegetation Index as 2.5 * (NIR - red) / (NIR + 2.4 * red + 1) from reflectances between zero and one, rejecting degenerate reflectances that zero the denominator.
References
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Enhanced vegetation index — Wikipedia contributors
Similar or alternative tools
- NDVI Calculator
Compute the Normalized Difference Vegetation Index as (NIR - red) / (NIR + red) from reflectances between zero and one, rejecting dark pixels whose reflectances sum to zero.
- Two-Band EVI
Compute the two-band Enhanced Vegetation Index as 2.5 * (NIR - red) / (NIR + 2.4 * red + 1) from reflectances between zero and one, rejecting degenerate reflectances that zero the denominator.
- CWSI Calculator
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