WorldView-1高解析衛星影像幾何分析

Geometrical Analysis of WorldView-1 Satellite Imagery

張智安(Tee-Ann Teo) ； 陳良健(Liang-Chien Chen)

《航測及遙測學刊》 14卷1期 (2009/03) Pp. 25-35

https://doi.org/10.6574/JPRS.2009.14(1).3

摘要

WorldView-1是首顆解析度達50公分的商用衛星，該衛星原始影像同時提供載體參數及有理函數係數。本研究之目的為針對WorldView-1建立幾何改正模式並進行幾何分析，研究中分別建立並比較嚴密幾何模式及有理函數模式。嚴密幾何模式使用衛星載體資料建立物像轉換關係，該模式包含補償方位參數及校正反投影影像坐標兩種方法；有理函數模式，使用感測器方位轉換有理函數係數建立物像轉換關係，再以地面控制點精化有理函數模式。研究中分別比較這兩種模式於高解析衛星影像之幾何改正。實驗結果顯示，嚴密幾何模式及有理函數模式的精度相當，但嚴密幾何模式有較佳的成果，使用分佈良好的9個控制點進行幾何校正，可達次像元精度。

關鍵字

幾何校正 ； 有理函數模式 ； 嚴密幾何改正模式

並列摘要

WorldView-1 is the first commercial satellite that provides 50cm spatial resolution. It contains both the on-board data and sensor-oriented rational polynomial coefficients (RPC). The objective of this investigation is to build up the geometric models and perform the geometric analysis for WorldView-1. The geometric correction models include rigorous sensor model (RSM) and rational function model (RFM). In the RSM, we use on-board data to build the relationship between object and image space. The correction models comprise the compensation of orientation parameters and correction of image coordinates. The RFM uses sensor-oriented RPC to establish the transformation of object and image space. Then, a small number of ground control points are applied to refine the model. Experimental results indicate that the results of RSM and RFM are similar. Both of the methods may reach sub-pixel accuracy when 9 control points are applied.

並列關鍵字

WorldView-1 ； Geometric correction ； Rational function model ； Rigorous sensor model