Dise？o de índices espectrales de la vegetación usando curvas iso-suelo

the design of spectral vegetation indexes (vi) based on the lines iso-leaf area index (same amount of vegetation and different optical properties of the soils under the vegetation) in two bands of the electromagnetic spectrum, the red (r) and near-infrared (nir), is complicated because of the expolinear pattern with change of slope, among the parameters that define these lines. an alternative design is to consider the patterns of iso-soil curves (same soil, and varying amounts of vegetation), using the nir as a saturation band as slow as possible. the introduced index isvi (vi based on the iso-soil curves) allows this type of approach, by using a transformation of the space of r to make it coincide with the soil line and a mathematical structure similar to uni-band spectral indexes. isvi validation using radiative simulations and crop experiments produced acceptable results, particularly with a perspective of minimizing the soil effect at píxel by píxel scale. the transformation of the isvi allows parameterization of the growth curve in a linear format, simple to implement in algorithmic terms.