Point association analysis of vessel target detection with SAR, HFSWR and AIS
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摘要: 星载SAR、高频地波雷达（HFSWR）和船只自动识别系统（AIS）是海上船只目标大范围遥感探测的主要手段。三种探测手段具有各自的优势和不足，在某些情况下可以互相补充。通过星载SAR、地波雷达和AIS三种手段的融合探测，可以识别出海上非合作目标，提高对海上船只目标的探测和监控能力。在船只目标多手段融合过程中，点迹关联是其中关键的一步，直接影响着多手段融合探测的精度和海上非合作目标的识别。本文开展了星载SAR与同步AIS、地波雷达与同步AIS等条件下的船只目标的点迹关联分析，评价了星载SAR和地波雷达两种手段的特点及船只目标探测能力。在此基础上提出了星载SAR、地波雷达和AIS等多手段的点迹关联方法。最后研究了多手段点迹关联处理中关键参数（包含距离门限、径向速度门限和方位门限）的选取及对关联结果的影响。Abstract: A space-borne synthetic aperture radar (SAR), a high frequency surface wave radar (HFSWR), and a ship automatic identification system (AIS) are the main remote sensors for vessel monitoring in a wide range. These three sensors have their own advantages and weaknesses, and they can complement each other in some situations. So it would improve the capability of vessel target detection to use multiple sensors including SAR, HFSWR, and AIS to identify non-cooperative vessel targets from the fusion results. During the fusion process of multiple sensors' detection results, point association is one of the key steps, and it can affect the accuracy of the data fusion and the efficiency of a non-cooperative target's recognition. This study investigated the point association analyses of vessel target detection under different conditions: spaceborne SAR paired with AIS, as well as HFSWR, paired with AIS, and the characteristics of the SAR and the HFSWR and their capability of vessel target detection. Then a point association method of multiple sensors was proposed. Finally, the thresholds selection of key parameters in the points association (including range threshold, radial velocity threshold, and azimuth threshold) were investigated, and their influences on final association results were analyzed.
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Key words:
- vessel target detection /
- SAR /
- HFSWR /
- AIS /
- point association /
- data fusion
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