高分三号全极化SAR散射特性分析与精度评价 
下载： 929次
Analysis and Accuracy Evaluation of Scattering Characteristics of GF-3 Full-Polarized SAR
1 辽宁工程技术大学测绘与地理科学学院, 辽宁 阜新 12300
2 中国科学院空天信息研究院, 北京 100190
图 & 表
图 1. 极化相干矩阵。(a) T11;(b) T22;(c) T33
Fig. 1. Polarization coherence matrixs. (a) T11; (b) T22; (c) T33
下载图片 查看原文
图 2. Pauli分解伪彩色图。(a) GF-3;(b) RADARSAT-2
Fig. 2. Pauli polarization decomposition pseudo-color maps. (a) GF-3; (b) RADARSAT-2
下载图片 查看原文
图 3. GF-3全极化SAR H/A/α极化分解结果。(a)散射熵;(b)平均散射角
Fig. 3. H/A/α polarization decomposition results from GF-3 full-polarized SAR. (a) Scattering entropy; (b) mean scattering angle
下载图片 查看原文
图 4. GF-3和RADARSAT-2的极化分解结果。(a)散射熵;(b)散射角
Fig. 4. Polarization decomposition results from GF-3 and RADARSAT-2. (a) Scattering entropy; (b) scattering angle
下载图片 查看原文
图 5. H-α散射平面。(a) GF-3;(b) RADARSAT-2
Fig. 5. H-α scattering plane. (a) GF-3; (b) RADARSAT-2
下载图片 查看原文
图 6. 基于H/A/α-Wishart的最大似然分类流程图
Fig. 6. Maximum likelihood classification flow chart based on H/A/α-Wishart
下载图片 查看原文
图 7. GF-3全极化SAR黄河口分类结果
Fig. 7. Classification result of Yellow River delta by GF-3 full-polarization SAR
下载图片 查看原文
表 1本文用到的影像参数
Table1. Image parameters used in this paper
| Satellite | Scene ID | Acquisition time (UTC) | Sensor | Resolution /m | Swath width /km |
|---|
| GF-3 | 3018619 | 2016-11-15 | SAR | 8 | 30 | | RADARSAT-2 | 05350120 | 2016-08-26 | SAR | 8 | 25 | | RADARSAT-2 | 05350130 | 2016-09-10 | SAR | 8 | 25 | | GF-2 | 1786033 | 2016-08-26 | PMS2 | 1 | 45 | | GF-2 | 1878224 | 2016-08-26 | PMS2 | 1 | 45 | | GF-2 | 1786032 | 2016-08-26 | PMS2 | 1 | 45 |
|
查看原文
表 2GF-3和RADARSAT-2极化分解参数的偏差
Table2. Polarization parameters bias from GF-3 and RADARSAT-2
| Parameter | GF-3 | RADARSAT-2 |
|---|
| Water body | Building | Plant | Mean | Water body | Building | Plant | Mean |
|---|
| H | 0.072 | 0.092 | 0.139 | 0.101 | 0.126 | 0.087 | 0.182 | 0.132 | | α | 3.740 | 6.800 | 10.230 | 6.923 | 6.045 | 6.901 | 8.673 | 7.206 |
|
查看原文
表 3极化精度统计
Table3. Statistics of polarization measurement accuracy
| No. of space in Fig.6 | GF-3 | RADARSAT-2 |
|---|
| Water body | Plant | Building | Water body | Plant | Building |
|---|
| 1 | 0 | 0.0023 | 0 | 0 | 0.0017 | 0.0007 | | 2 | 0 | 0.0283 | 0.0017 | 0 | 0.0017 | 0.0030 | | 3 | 0 | 0.1903 | 0.5063 | 0 | 0.0437 | 0.4147 | | 4 | 0 | 0.5503 | 0.2117 | 0 | 0.4110 | 0.1317 | | 5 | 0.0023 | 0.2160 | 0.0553 | 0.1540 | 0.4320 | 0 | | 6 | 0 | 0 | 0.2170 | 0 | 0 | 0.4453 | | 7 | 0 | 0 | 0.0040 | 0 | 0 | 0.0033 | | 8 | 0.9977 | 0.0127 | 0.0040 | 0.8460 | 0 | 0.0013 | | Average accuracy | 0.9977 | 0.5786 | 0.7233 | 0.8460 | 0.4127 | 0.8600 | | Overall accuracy | 0.7665 | 0.7062 |
|
查看原文
表 4三类典型地物的联合因子ρcs
Table4. Joint factor ρcs of three kinds of typical ground features
| Satellite | ρcs |
|---|
| Waterbody | Building | Plant | Mean |
|---|
| GF-3 | 85.34 | 28.99 | 122.72 | 79.01 | | RADARSAT-2 | 80.25 | 30.84 | 118.54 | 76.54 |
|
查看原文
表 5初始分类训练参数列表
Table5. List of training parameters for initial classification
| Initial iteration parameter | Value |
|---|
| Number of iterations | 10 | | Non-convergent pixel proportion /% | 2 | | Window size | Azimuth direction | 5 | | Range direction | 5 | | Boundary conditions of8 initial clustering | No.1 | 0.9<H<1 | 55<α<90 | | No.2 | 0.9<H<1 | 40<α<55 | | No.3 | 0.5<H<0.9 | 50<α<90 | | No.4 | 0.5<H<0.9 | 40<α<50 | | No.5 | 0.5<H<0.9 | 0<α<40 | | No.6 | 0 <H<0.5 | 47.5<α<90 | | No.7 | 0 <H<0.5 | 42.5<α<47.5 | | No.8 | 0 <H<0.5 | 0<α<42.5 |
|
查看原文
表 6迭代过程的变量值
Table6. Variable values in iterative process
| Number of iterations | Non-convergent pixel number | Minimum distance |
|---|
| 1 | 16777216 | -9.635548 | | 2 | 6398359 | -11.468143 | | 3 | 3690955 | -12.511221 | | 4 | 2418604 | -12.684139 | | 5 | 1868671 | -12.705543 | | 6 | 1374417 | -12.712374 | | 7 | 992203 | -12.717149 | | 8 | 748956 | -12.720287 | | 9 | 585886 | -12.722660 | | 10 | 487202 | -12.724305 |
|
查看原文
表 7GF-3全极化SAR黄河口分类结果的精度
Table7. Accuracy of GF-3 full-polarization SAR classification results of Yellow River delta
| Type | Accuracy /% |
|---|
| Water body | Plant | Building | Bare soil | Intertidal zone |
|---|
| Water body | 90.50 | 0 | 0 | 10.35 | 12.30 | | Plant | 0 | 74.30 | 2.2 | 0.28 | 8.02 | | Building | 0 | 5.03 | 71.28 | 7.05 | 4.741 | | Bare soil | 4.25 | 15.62 | 16.37 | 66.02 | 4.619 | | Intertidal zone | 5.25 | 2.949 | 10.15 | 16.3 | 70.32 |
|
查看原文
李佳慧, 王晓晨. 高分三号全极化SAR散射特性分析与精度评价[J]. 中国激光, 2020, 47(3): 0310002. Li Jiahui, Wang Xiaochen. Analysis and Accuracy Evaluation of Scattering Characteristics of GF-3 Full-Polarized SAR[J]. Chinese Journal of Lasers, 2020, 47(3): 0310002.
PDF全文
