Acta Geodaetica et Cartographica Sinica ›› 2016, Vol. 45 ›› Issue (7): 825-833.doi: 10.11947/j.AGCS.2016.20150520

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Applying Spatial Statistics into Remote Sensing Pattern Recognition: with Case Study of Cropland Extraction Based on GeOBIA

MING Dongping, QIU Yufang, ZHOU Wen   

  1. School of Information Engineering, China University of Geosciences(Beijing), Beijing 100083, China
  • Received:2015-10-14 Revised:2016-02-24 Online:2016-07-20 Published:2016-07-28
  • Supported by:
    The National Natural Science Foundation of China(No.41371347);Fundamental Research Funds for the Central Universities(No.2652013084)

Abstract: Information extraction from remote sensing image is the key to remote sensing applications and scale selection is one of the key factors influencing the information extraction accuracy. This paper discusses the theoretical foundation of applying spatial statistical methods to resolve the scale related issues involved in remote sensing pattern classification. Aiming at geo-object-based image analysis (GeOBIA), scale parameters involved in multi-scale segmentation for GeOBIA are generalized into three ones, and they are spatial parameter, attribute parameter and merging threshold. Further, the pre-estimation method of the optimal scale parameters is proposed based on spatial statistics. Taking GeOBIA based cropland extraction from SPOT-5 image as an example, this paper proposes a cropland extraction method combining spatial statistics based adaptive scale parameter pre-estimation and object-oriented classification. This paper employs mean-shift segmentation and series Rof object based classification on different scales to verify the validity of this method. Experimental results support the object based cropland extraction method based on the data-driven scale pre-estimation. The cropland extraction result by using the pre-estimated segmentation parameters can guarantee the accuracy of GeOBIA classification and the cropland extraction based on GeOBIA and adaptive scale pre-estimation avoids the time-consuming trial-and-error practice and speeds up the object-oriented classification procedure.

Key words: geo-object-based image analysis, image segmentation, scale pre-estimation, spatial statistics, cropland extraction

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