多策略ATLAS数据优选与影像匹配相结合的SAR高程控制点提取

余洋 靳国旺 熊新 童成功 张国平

余洋, 靳国旺, 熊新, 等. 多策略ATLAS数据优选与影像匹配相结合的SAR高程控制点提取[J]. 雷达学报, 2023, 12(1): 64–75. doi: 10.12000/JR22134
引用本文: 余洋, 靳国旺, 熊新, 等. 多策略ATLAS数据优选与影像匹配相结合的SAR高程控制点提取[J]. 雷达学报, 2023, 12(1): 64–75. doi: 10.12000/JR22134
YU Yang, JIN Guowang, XIONG Xin, et al. SAR elevation control point extraction combining multistrategy ATLAS data preference and image matching[J]. Journal of Radars, 2023, 12(1): 64–75. doi: 10.12000/JR22134
Citation: YU Yang, JIN Guowang, XIONG Xin, et al. SAR elevation control point extraction combining multistrategy ATLAS data preference and image matching[J]. Journal of Radars, 2023, 12(1): 64–75. doi: 10.12000/JR22134

多策略ATLAS数据优选与影像匹配相结合的SAR高程控制点提取

doi: 10.12000/JR22134
基金项目: 国家自然科学基金(41474010, 61401509),河南省自然科学基金(182300410007)
详细信息
    作者简介:

    余 洋,硕士生,主要研究方向为微波遥感

    靳国旺,博士,教授,博士生导师,主要研究方向为微波遥感

    熊 新,博士,讲师,主要研究方向为微波遥感

    童成功,硕士,主要研究方向为合成孔径雷达数据处理

    张国平,博士生,主要研究方向为星载激光测高数据处理与应用

    通讯作者:

    靳国旺 guowang_jin@163.com

  • 责任主编:张红 Corresponding Editor: ZHANG Hong
  • 中图分类号: TP75; P237

SAR Elevation Control Point Extraction Combining Multistrategy ATLAS Data Preference and Image Matching

Funds: The National Natural Science Foundation of China (41474010, 61401509), Natural Science Foundation of Henan Province (182300410007)
More Information
  • 摘要: 为了精化星载SAR影像几何参数并提高立体定位精度,借鉴星载激光测高数据光学遥感影像高程控制点提取思路,设计了一种多策略高级地形激光测高系统(ATLAS)数据优选与影像匹配相结合的SAR高程控制点提取方法。该方法采用非夜间观测光子滤除、高置信度光子选取、SRTM DEM辅助的粗差剔除、大偏心率椭圆滤波核平坦区域光子筛选等多种策略,从ATLAS数据ATL03级产品中提取高质量、平坦区域的激光高程点,再依据SRTM DEM对斜距SAR影像进行地理编码,按激光高程点的平面坐标选取局部谷歌地球影像作为足印影像,采用秩自相似描述子进行足印影像与SAR地理编码影像的匹配,得到与激光高程点对应的SAR影像像点坐标,从而提取SAR高程控制点。采用中国登封市、日本横须贺市两个区域的ATLAS数据进行了高分三号SAR高程控制点提取实验,利用提取的高程控制点进行SAR影像几何参数精化,大幅提升了立体定位精度,验证了该文高程控制点提取方法的可行性和有效性。

     

  • 图  1  多策略ATLAS数据优选与影像匹配相结合的SAR高程控制点提取流程

    Figure  1.  Process of SAR elevation control point extraction combining multistrategy ATLAS data preference and image matching

    图  2  多策略ATLAS数据优选流程

    Figure  2.  Process of multistrategy ATLAS data preference

    图  3  物像不一致造成的高程差示意图

    Figure  3.  Schematic diagram of height difference caused by difference between object and image

    图  4  椭圆滤波核提取分析示意图

    Figure  4.  Schematic diagram of ellipse filter kernel extraction

    图  5  平坦区域光子提取结果示意图

    Figure  5.  Schematic diagram of laser points extraction result in flat area

    图  6  GE影像与SAR地理编码影像匹配示意图

    Figure  6.  Schematic diagram of matching between GE image and SAR geocoding image

    图  7  匹配窗口示意图

    Figure  7.  Matching window diagram

    图  8  匹配点及邻域点示意图

    Figure  8.  Schematic diagram of matching points and neighborhood points

    图  9  各区域地理位置及影像范围图

    Figure  9.  Geographical location and topographic map of each area

    图  10  高程残差直方图

    Figure  10.  Elevation difference histogram

    图  11  匹配结果示意图

    Figure  11.  Schematic diagram of matching results

    图  12  激光高程点分布示意图

    Figure  12.  Schematic diagram of laser elevation point distribution

    图  13  区域1部分检查点示意图

    Figure  13.  Schematic diagram of some checkpoints in the area 1

    图  14  检查点分布情况示意图

    Figure  14.  Schematic diagram of the distribution of checkpoints

    图  15  检查点误差情况

    Figure  15.  Checkpoint error condition

    表  1  算法使用到的ATL03参数

    Table  1.   ATL03 parameters used by the algorithm

    参数含义本文符号
    lat_ph每个接收光子纬度(WGS84)B
    lon_ph每个接收光子经度(WGS84)L
    h_ph每个接收光子高程(WGS84椭球高)H
    signal_conf_ph每个接收光子置信度C
    data_start_utc数据开始时间${t_0}$
    dist_ph_along每个接收光子在该组中的沿轨距离${l_i}$
    segment_length每组沿轨距离(19.8~20.2 m)${L_i}$
    segment_ph_cnt每组内光子数${w_i}$
    下载: 导出CSV

    表  2  SAR影像数据基本参数

    Table  2.   Basic parameters of SAR image data

    区域序号成像日期轨道类型入射角尺寸(像素)中心经纬度
    区域1影像120191021升轨23.31°~24.58°32966$ \times $12576(113.114°E, 34.514°N)
    影像220191206降轨42.52°~43.18°30944$ \times $15648(113.120°E, 34.512°N)
    影像320190829降轨46.24°~46.82°28224$ \times $16056(113.130°E, 34.511°N)
    区域2影像420190116升轨38.65°~39.38°30558$ \times $14624(139.645°E, 35.290°N)
    影像520190116降轨25.16°~26.32°31920$ \times $12576(139.645°E, 35.296°N)
    影像620190121降轨35.46°~36.25°30638$ \times $13600(139.642°E, 35.296°N)
    下载: 导出CSV

    表  3  不同筛选条件下光子数量

    Table  3.   The number of photons under different screening conditions

    数据类型区域1区域2
    光子数量(个)数据剔除率(%)光子数量(个)数据剔除率(%)
    原始数据7 221 63405 651 8080
    夜间观测数据208 93597.11309 83294.52
    高置信度数据171 24218.04276 93810.62
    粗差剔除数据157 635 7.95276 890 0.02
    平坦区域数据6 60995.8125 64190.74
    下载: 导出CSV

    表  4  区域1 SAR高程控制点高程信息

    Table  4.   Elevation information of SAR elevation control points in area 1

    序号高程(m)序号高程(m)序号高程(m)序号高程(m)序号高程(m)
    1457.0911402.2821426.6031359.6641368.92
    2430.5312397.5822373.9932355.8042375.77
    3435.5413404.5123351.4533352.6743377.07
    4435.3214403.8924348.6834343.6344373.36
    5435.4315385.8825333.2235336.5045372.15
    6435.1016384.2326412.3236336.4146371.26
    7439.4217382.3827390.6037322.3047370.16
    8408.4718407.0528389.6238334.3748368.57
    9406.2819403.9929363.3339334.76
    10404.0420407.5930360.9840351.15
    下载: 导出CSV

    表  5  区域2 SAR高程控制点高程信息

    Table  5.   Elevation information of SAR elevation control points in area 2

    序号高程(m)序号高程(m)序号高程(m)序号高程(m)序号高程(m)
    195.58895.691539.422240.072939.47
    238.719204.95 1639.322340.053069.25
    3107.14 10205.64 1740.422439.7331104.99
    4107.19 1171.391839.082539.953271.12
    5107.19 1271.531940.332638.903371.23
    657.8413222.95 2040.442778.163460.62
    783.251438.982139.632839.443560.64
    下载: 导出CSV

    表  6  检查点信息

    Table  6.   Information of checkpoints

    序号经度(°)纬度(°)高程(m)
    1*.**3996*.**7348459.38
    2*.**0267*.**2819487.50
    3*.**6372*.**4978438.96
    4*.**2031*.**1293399.94
    5*.**9026*.**1702384.47
    6*.**7216*.**9004405.98
    7*.**4967*.**1815430.68
    8*.**3398*.**2909374.35
    9*.**8198*.**0609323.37
    10*.**9957*.**5764383.76
    11*.**2113*.**4711343.14
    下载: 导出CSV

    表  7  定位结果

    Table  7.   Results of positioning

    定位
    方法
    SAR高程控制
    点数(个)
    检查
    点数(个)
    平面中
    误差(m)
    高程中
    误差(m)
    方法101110.4230.42
    方法21011 7.35 3.77
    方法34811 7.34 3.69
    下载: 导出CSV
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  • 收稿日期:  2022-07-01
  • 修回日期:  2022-11-10
  • 网络出版日期:  2022-11-20
  • 刊出日期:  2023-02-28

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