摘要
提出了一种模拟自然场景的SAR图像的新方法。该方法用双尺度分形模型和小面单元法来模拟自然场景,利用其Kirchhoff近似求得自然场景的后向散射系数;在求回波和图像处理时采用二维FFT,大大减少了计算量。计算机仿真结果显示,该方法能很好地模拟出自然场景的speckle特征和SAR图像的几何畸变现象。
A new method for simulating the synthetic aperture radar image in natural scene is proposedin this paper. Based on a two scaled fractal model and facet model for natural scene, Kirchhoff approxima-tion evaluation of backscattering coefficients of natural scene and two dimensional FFT code for echo and im-age processing are used. The computer simulation shows a realistic speckle character and geomctric distor-tion phenomena of SAR image.
出处
《雷达科学与技术》
2003年第4期210-214,共5页
Radar Science and Technology
基金
国家自然科学基金(60072041)
