Title: Approach to terrain pretreatment for the Yazidang reservoir based on image processing

Authors: Lingxiao Huang; Lanxiang Zheng; Hefang Jing; Xuande Zhang; Chunguang Li

Addresses: Department of Civil and Hydraulic Engineering, Ningxia University, Yinchuan, 750021, China; Department of Information Engineering, Ningxia University, Yinchuan, 750021, China ' Department of Resources and Environment, Ningxia University, Yinchuan, 750021, China ' Department of Civil Engineering, Beifang University of Nationalities, Yinchuan, 750021, China ' Department of Electrical and Information Engineering, Shaanxi University of Science and Technology, Xian, 710021, China ' Department of Civil Engineering, Beifang University of Nationalities, Yinchuan, 750021, China

Abstract: The terrain pretreatment based on image processing in the Yazidang reservoir is presented. The image processing is based on the image stitching and the image edge detection. The SURF algorithm is used to extract feature points of reservoir partial images. To match feature points and stitch reservoir partial images, the wide view reservoir image is stitching using KD-tree algorithm and linear gradient fusion algorithm. The improved mathematical morphology is adopted, and five different shapes and four different scales of structural elements are implemented to obtain precise bank edge of reservoir image. The *.dxf file is obtained by using CAD software to depict reservoir shore contours. It transforms *.dxf into *.kml to extract latitude and longitude information of reservoir bank edge. The satisfied mesh effect is generated by using the Delaunay triangulation algorithm. The result shows that accurate and detailed reservoir terrain can be obtained using the image processing method and the GE software, which provides a prerequisite for the numerical simulation of sedimentation in the Yazidang reservoir.

Keywords: terrain pretreatment; image processing; SURF algorithm; KD-tree algorithm; linear gradient fusion algorithm; mathematical morphology; Delaunay triangulation.

DOI: 10.1504/IJICT.2019.099117

International Journal of Information and Communication Technology, 2019 Vol.14 No.3, pp.356 - 372

Received: 06 Mar 2017
Accepted: 06 Aug 2017
Published online: 16 Apr 2019 *

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