基于RPC模型的ZY-3正射纠正研究

采用基于RPC模型进行ZY-3影像正射纠正处理时,当使用全局布点控制方案时控制点增加到12个以上后,对整景影像的纠正精度影响不明显,且由于选取多个高精度的控制点非常困难,而有时控制点的增加并不一定能带来精度的提高。本文通过采用几种不同的控制点布设方案对同一景ZY-3影像进行正射纠正,并对几种方案的纠正成果进行了精度比较和分析,从而进一步证实了选择合适的控制点布设方案和控制点数量大大提高ZY-3影像的纠正质量和纠正效率。

A ZY-3 Image Rectification Method Based on Rational Polynomial Coefficients Model

Using RPC （ Rational Polynomial Coefficients ） model to do image ortho-rectification, when the number of global control points is added more than 12 points, the whole image rectification accuracy of these global control points is not so obvious .Further-more, the selection of several high accuracy control points is indeed a difficult task , and sometimes the increase of the number of con-trol points is not always accompanied with the improvement of image rectification accuracy .Through using several different control point layout schemes for the same ZY -3 image to accomplish ortho -rectification, doing accuracy comparison and analysis among these rectification results , this paper further demonstrates the appropriate scheme of control points layout and the suitable number of control points will greatly improve the accuracy and efficiency of ZY -3 image rectification .