TSAVI

TSAVI (Transformed Soil Adjusted Vegetation Index)

Calculation:

TSAVI = (s * (NIR - s * R - a)) / (a * NIR + R - a * s + X * (1 + s^2))

with s = soil line slope,

a = soil line intercept,

X = adjustment factor

Characteristics:

ratio-based index,

limited range -1<TSAVI<1,

adjusted by soil line (a) and slope (s),

“effect of soil background minimized by X” (0.08 in first paper)

Reference:

Baret F., Guyot G., Major D., 1989. TSAVI: a vegetation index which minimizes soil brightness effects on LAI or APAR estimation. 12th Canadian Symposium on Remote Sensing and IGARSS 1990, Vancouver, Canada, 07/10-14