Comparison of partial least square regression, support vector machine, and deep-learning techniques for estimating soil salinity from hyperspectral data

Wenzhi Zeng; Dongying Zhang; Yuanhao Fang; Jingwei Wu; Jiesheng Huang

doi:10.1117/1.JRS.12.022204

22 January 2018 Comparison of partial least square regression, support vector machine, and deep-learning techniques for estimating soil salinity from hyperspectral data

Wenzhi Zeng, Dongying Zhang, Yuanhao Fang, Jingwei Wu, Jiesheng Huang

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 12, Issue 2, 022204 (January 2018). https://doi.org/10.1117/1.JRS.12.022204

Abstract

This study explored three techniques for estimating the soil salt content from Landsat data. First, the 127 items of in situ measured hyperspectral reflectance data were collected and resampled to the spectral resolution of the reflectance bands of Landsat 5 and Landsat 8, respectively. Second, 12 soil salt indices (SSI) summarized from previous literature were determined based on the simulated Landsat bands. Third, 127 measurement groups with Landsat bands and SSI were randomly divided into training (102) and testing subgroups (25). Three techniques including partial least square regression (PLSR), support vector machine (SVM), and deep learning (DL) were used to establish a soil salinity model using SSI and the simulated Landsat bands as independent variables (IV), respectively. Results indicated that PLSR with SSI performed best for both simulated Landsat 5 and Landsat 8 data. Compared with PLSR, SVM underestimated soil salt content, whereas DL obtained centralized simulations and failed to capture the lower and upper observations. We recommend the PLSR model with SSI as IV to estimate soil salt content because it can identify >66% moderate-to-high-saline soils, which indicates its great potential for soil salt monitoring in arid or semiarid regions.

Citation Download Citation

Wenzhi Zeng, Dongying Zhang, Yuanhao Fang, Jingwei Wu, and Jiesheng Huang "Comparison of partial least square regression, support vector machine, and deep-learning techniques for estimating soil salinity from hyperspectral data," Journal of Applied Remote Sensing 12(2), 022204 (22 January 2018). https://doi.org/10.1117/1.JRS.12.022204

Received: 28 April 2017; Accepted: 26 December 2017; Published: 22 January 2018

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available