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Method for updating IKONOS RPC data by additional GCP

  • US 20040122633A1
  • Filed: 07/01/2003
  • Published: 06/24/2004
  • Est. Priority Date: 12/21/2002
  • Status: Abandoned Application
First Claim
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1. A method for updating IKONOS rational polynomial coefficient (RPC) data by using a small number of ground control points (GCPs), the method including the steps of:

  • (a) receiving the RPC data and coordinate values of the GCPs;

    (b) calculating an error of the RPC data;

    (c) calculating weights of pseudo ground control points (pseudo GCPs), wherein the pseudo GCPs are extracted from the RPC data in 3D normalized cubic;

    (d) calculating weights of the GCPs;

    (e) generating a 3D normalized space and extracting 3D normalized coordinate values of the GCPs and the pseudo GCPs;

    (f) creating a rational functional model (RFM) observation equation by using the GCPs and the pseudo GCPs and updating the RPC data by a least square technique.

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