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Mao Zhihua, Huang Haiqing, Zhu Qiankun, Pan Delu. Automatic location of GCPs at sea[J]. Haiyang Xuebao, 2000, 22(5): 41-50.
Citation: Mao Zhihua, Huang Haiqing, Zhu Qiankun, Pan Delu. Automatic location of GCPs at sea[J]. Haiyang Xuebao, 2000, 22(5): 41-50.

Automatic location of GCPs at sea

  • Received Date: 1999-04-08
  • Rev Recd Date: 1999-06-10
  • A new method is developed to locate ground control points (GCPs) at sea.All points at the coastline,extracted by Roberts' edge operator from the first image,are taken as candidate points of GCPs.The counterpart points in the second image are found by correlation-relaxation (CR) technique.The accuracy of GCPs is guaranteed by a decision rule.The methods of average and interpolation are used to locate new GCPs at sea.A new transformation of geometric rectification is also developed with zero RMS error.The coordinates of the rectified image can be directly obtained from interpolation method instead of a 1st-order bivariate transformation.The above-mentioned approach can be used in dynamic monitoring and integrating of satellite data.
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