摘要： 针对卫星影像存在的仿射畸变，研究并给出了一种实用的自动校正方法。分析了仿射畸变模型参数的计算方法，对几何校正控制点进行了自动选定，辨识出了畸变模型参数，采用均值法及中值法对模型辨识参数进行优化处理，进而通过坐标变换及灰度的双线性插值实现卫星影像仿射畸变的自动、精确校正。仿真实验结果说明了该方法的可行性、有效性。

关键词: 卫星影像；几何校正；仿射畸变；坐标变换；双线性插值

Abstract: For the purpose of eliminating the affine distortion of satellite image, a practical auto-rectification approach is proposed. Firstly, the calculation method of affine distortion model parameters is analyzed. Then, control point (CP) for geometric rectification is auto-selected and the parameters of distortion model are identified. Furthermore, the mean-value method and mid-value method are adopted to the optimization of the identified parameters. Finally, through coordinate transformation and grayscale bilinear interpolation, the satellite image with affine distortion is auto-accurate certificated. The simulation experimental results show the feasibility and effectivity of the proposed method

Key words: Satellite image; Geometric rectification; Affine distortion; Coordinate transformation; Bilinear interpolation