NPCINormalized Pigments Chlorophyll Ratio Index

Summary

The Normalized Pigments Chlorophyll Ratio Index (NPCI) is a vegetation spectral index intended for multispectral sensing. It was introduced in 1994; its source is cited as J. Peñuelas, J.A. Gamon, A.L. Fredeen, J. Merino, & C.B. Field (1994). Reflectance indices associated with physiological changes in nitrogen- and water-limited sunflower leaves. Remote Sensing of Environment, 48(2). https://doi.org/10.1016/0034-4257(94)90136-8 🡕.

Based on the latest citation data, this index is in the 80.44th percentile overall, ranking 63 out of 317 indices with citation data. Among the 29 indices published within two years of 1994, it ranks 20 (34.48th percentile). Within the vegetation application domain, it is in the 73.71th percentile and ranks 57 out of 213 indices with citation data. Among the 28 similarly aged vegetation indices, it ranks 19 (35.71th percentile).