Image and Signal Processing Methods

Mapping Robinia pseudoacacia forest health in the Yellow River delta by using high-resolution IKONOS imagery and object-based image analysis

[+] Author Affiliations
Hong Wang, Kaiyu Lu

Hohai University, School of Earth Sciences and Engineering, No. 8 Focheng West Road, Nanjing, Jiangsu 211100, China

Ruiliang Pu

University of South Florida, School of Geosciences, 4202 East Fowler Avenue, NES 107, Tampa, Florida 33620, United States

J. Appl. Remote Sens. 10(4), 045022 (Dec 20, 2016). doi:10.1117/1.JRS.10.045022
History: Received August 4, 2016; Accepted November 17, 2016
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Abstract.  The Robinia pseudoacacia forest in the Yellow River delta of China has been planted since the 1970s, and a large area of dieback of the forest has occurred since the 1990s. To assess the condition of the R. pseudoacacia forest in three forest areas (i.e., Gudao, Machang, and Abandoned Yellow River) in the delta, we combined an estimation of scale parameters tool and geometry/topology assessment criteria to determine the optimal scale parameters, selected optimal predictive variables determined by stepwise discriminant analysis, and compared object-based image analysis (OBIA) and pixel-based approaches using IKONOS data. The experimental results showed that the optimal segmentation scale is 5 for both the Gudao and Machang forest areas, and 12 for the Abandoned Yellow River forest area. The results produced by the OBIA method were much better than those created by the pixel-based method. The overall accuracy of the OBIA method was 93.7% (versus 85.4% by the pixel-based) for Gudao, 89.0% (versus 72.7%) for Abandoned Yellow River, and 91.7% (versus 84.4%) for Machang. Our analysis results demonstrated that the OBIA method was an effective tool for rapidly mapping and assessing the health levels of forest.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Hong Wang ; Kaiyu Lu and Ruiliang Pu
"Mapping Robinia pseudoacacia forest health in the Yellow River delta by using high-resolution IKONOS imagery and object-based image analysis", J. Appl. Remote Sens. 10(4), 045022 (Dec 20, 2016). ; http://dx.doi.org/10.1117/1.JRS.10.045022


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