6.6. 压缩感知超分辨SAR成像

6.6.1. 压缩感知超分辨SAR成像

压缩感知成像 小节已经介绍了压缩感知SAR成像原理.

压缩成像 [4] ,

[3]

6.6.2. 实验与分析

6.6.3. 实验与分析

仿真数据

实验说明

  • 仿真场景大小: \(128\times 128\)

  • 回波矩阵大小: \(32\times 32\)

  • 稀疏表示字典: 无, DCT , DWT

  • 优化方法: Lasso , OMP

仿真点目标场景图及仿真生成点SAR原始数据幅度与相位图如下:

仿真点目标场景图, 仿真SAR原始数据幅度相位图

图 6.24 仿真点目标场景图, 仿真SAR原始数据幅度相位图

仿真船只场景图及仿真生成点SAR原始数据幅度与相位图如下:

仿真船只场景图及仿真生成点SAR原始数据幅度与相位图如下

图 6.25 仿真船只场景图及仿真生成点SAR原始数据幅度与相位图如下

仿真荷花场景图及仿真生成点SAR原始数据幅度与相位图如下:

仿真荷花场景图及仿真生成点SAR原始数据幅度与相位图如下

图 6.26 仿真荷花场景图及仿真生成点SAR原始数据幅度与相位图如下

实验代码

实验结果

1. OMP优化, 不采用字典进行稀疏表示, 和采用DCT字典进行稀疏表示的结果如下:

点目标结果

Compressive Sensing based and RDA Imaging Results of points.

图 6.27 Compressive Sensing based and RDA Imaging Results of points (OMP).

船只结果:

Compressive Sensing based and RDA Imaging Results of ship.

图 6.28 Compressive Sensing based and RDA Imaging Results of ship (OMP).

荷花结果:

Compressive Sensing based and RDA Imaging Results of lotus (OMP).

图 6.29 Compressive Sensing based and RDA Imaging Results of lotus.

2. Lasso优化, 不采用字典进行稀疏表示, 和采用DCT字典进行稀疏表示的结果如下:

点目标结果

Compressive Sensing based and RDA Imaging Results of points.

图 6.30 Compressive Sensing based and RDA Imaging Results of points (Lasso).

船只结果:

Compressive Sensing based and RDA Imaging Results of ship.

图 6.31 Compressive Sensing based and RDA Imaging Results of ship (Lasso).

荷花结果:

Compressive Sensing based and RDA Imaging Results of lotus.

图 6.32 Compressive Sensing based and RDA Imaging Results of lotus (Lasso).

真实数据

实验说明

实验代码

实验结果