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.
Description
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.
Two-Band EVI is a focused biology tool that 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. It calculates locally from the values you enter and exposes the result without changing the source observations.1
When to use Two-Band EVI
Use Two-Band EVI when you need to 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. Enter NIR reflectance and Red reflectance using the definitions and units below so the result can be reproduced.
- NIR reflectance
- Near-infrared reflectance between 0 and 1.
- Red reflectance
- Red-band reflectance between 0 and 1.
How Two-Band EVI calculates the result
The published tool contract uses this rule: 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.
- Two-band EVI
- Two-band EVI value; signed and typically below one.
Limitations of Two-Band EVI
The calculation does not propagate measurement uncertainty, sampling error, or biological and chemical variability. NIR reflectance must remain between 0 and 1; Red reflectance must remain between 0 and 1.
Alternative or Complementary measurements
Retain the original NIR reflectance and Red reflectance values and their units alongside the result. EVI Calculator is useful when you instead 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. Band Intensity Ratio provides another view by helping you normalise a western blot target band by dividing its densitometry intensity by the loading control intensity of the same lane.
References
-
Enhanced vegetation index — Wikipedia contributors
Similar or alternative tools
- 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.
- Band Intensity Ratio
Normalise a western blot target band by dividing its densitometry intensity by the loading control intensity of the same lane.
- Leakage Two Step
Compute the electrolyte leakage ratio as the initial conductivity divided by the maximum conductivity measured after a second boil; the result is a fraction between zero and one.