Table 6 Remote sensing factors information. B1 is the blue band, B2 is the green band, B3 is the red band, B4 is the near-infrared band, B5 is the shortwave infrared-1 band, and B7 is the shortwave infrared-2 band.

From: Estimating forest aboveground carbon sink based on landsat time series and its response to climate change

Feature types

Factor types

Remote sensing factors

Texture features

Gray-level co-occurrence Matrix

Homogeneity (HO); Dissimilarity (DI); Mean (ME); Angular second moment (SM); Entropy (EN); Correlation (CC); Variance (VA); Contrast (CO)

Filtering of probabilistic statistics

Skewness (SK)

Spectral features

General vegetation index factors

NDVI = (B4 − B3)/(B4 + B3);

ND32 = (B3 − B2)/(B3 + B2);

ND54 = (B5 − B4)/(B5 + B4);

ND53 = (B5 − B3)/(B5 + B3);

ND57 = (B5 − B7)/(B5 + B7);

ND452 = (B4 + B5 − B2)/(B4 + B5 + B2);

DVI = B4 − B3;

RVI = B4/B3;

RVI = B4/B3;

ARVI = (B4 − (2B3 − B1))/(B4 + (2B3 − B1))

Information enhancement factors

Principal component analysis (PCA1, PCA2, PCA3PCA4, PCA5, PCA7);

VIS123 = B1 + B2 + B3;

MID = B5 + B7;

Albedo = B1 + B2 + B3 + B4 + B5 + B7;

MID57 = B5 + B7

K-T

Simple ratio vegetation indices

B4/B2, B5/B3, B5/B4, B5/B7, B7/B3, B3/Albedo, B4×B3/B7

Original band factors

B1, B2, B3, B4, B5, B7

Back to article page