Table 4 The regression model analysis of the vegetation cover area with potassium.

From: Geochemical inversion study of potassium and phosphorus in soil based on neural network and ZY1-02D hyperspectral data

Element

Region

Regression Analysis Method

Verification R2

MSE

RMSE

Training time

K

vegetation cover area

MSR

0.314

50.788

7.127

-

PLSR

0.314

49.491

7.035

-

BP

0.570

46.805

6.841

1.1900s

ELM

0.654

22.686

4.763

0.0052s

K

bare areas

MSR

0.023

65.134

8.071

-

PLSR

0.262

18.441

4.294

-

BP

0.359

10.262

3.203

1.1629s

ELM

0.617

9.102

3.017

0.0032s

P

vegetation cover area

MSR

0.012

0.076

0.276

-

PLSR

0.022

0.074

0.272

-

BP

0.127

0.072

0.268

1.0943s

ELM

0.335

0.041

0.202

0.0031s

P

bare areas

MSR

0.023

0.065

0.255

-

PLSR

0.026

0.064

0.253

-

BP

0.209

0.065

0.255

1.1150s

ELM

0.331

0.035

0.187

0.0032s

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